Abstract: A sports demonstration figure including a body portion comprised of a leg portion, a torso portion, a pair of arm portions, and a head portion. The leg portion has a pair of apertures therein dimensioned for receiving two fingers therein. The leg portion has a pair of openings disposed on lower ends thereof.

Abstract: A walking apparatus having an appearance similar to a real insect and capable of taking movements similar to those of a real insect is provided. A walking apparatus comprises a body and at least two of leg portions provided in the left and the right sides of the body. A power source and a plurality of gear wheels rotated by the power source are provided inside the body. The leg portions have rear parts mounted in the body, which are mounted in the rotational centers of the gear wheels and are made to be rotated on their axes. The leg portions can be bent and are formed such that they can retain the bent posture.

Abstract: An animated holiday-scene display device for providing decorative entertainment tools. The animated holiday-scene display device includes a base member having a top side and being adapted to rest upon a surface; and also includes an ornamental figurine being mounted upon the topside of the base member and having a body and movable arms; and further includes an ornamental object also being mounted upon the top side of the base member; and also includes a light-emitting assembly being disposed throughout the ornamental object; and further includes an assembly for actuating movement of the ornamental figurine.

Abstract: A two-legged body includes at least two legs, and oscillation element and connecting element for the mutual coupling of the legs and the oscillation element, wherein the legs are pivotable in relation to the connecting element and during operation undergo a reciprocating angular displacement in relation to the connecting element, depending on the oscillation element. The oscillation element includes at least two springs for the generation of antagonistic forces, which springs each are coupled at one side with a leg, and together with the mass present in the body they are able to form a vibrating mass-spring system. The spring stiffness of at least one spring is adjustable.

Abstract: An animated doll having an enlarged head and enlarged feet relative to its body, and including a combination of independent, interactive features. The interactive features include a head position assembly, which controls rotation of the head, and an eye assembly mechanism, which drives and controls the opening and closing of eyelids on the doll. The doll may also include a communication port to receive removable external components, which are associated with a pre-recorded response.

Abstract: A motorized snake includes a chassis having a front end and a rear end with at least one ground contacting drive wheel. A neck is pivotally coupled with the front edge of the chassis to pivot forward and back. A head portion, which includes eyes and an extending tongue, is pivotally connected to the front portion of the neck. A multi-section tail including a trailer and at least one follower is coupled with the rear end of the chassis. The trailer has at least one ground contacting wheel and is coupled with the rear end of the chassis to pivot side to side on the rear end of the chassis. The one or more followers are coupled with the rear end of the trailer in a chain to pivot side to side on the rear end of the trailer.

Abstract: An jointed tail of a pet robot can be configured simply and driven to curve freely and autonomously by fitting an jointed cylindrical member 25 around outer circumferences of two wire portions 24a and 24b composed of a wire 24 which is folded nearly into a shape of a hair pin, rotatingly driving two driven ends 24d and 24e on a side opposite to a tip 24c of the two wire portions 24a and 24b connected to each other around an X axis and a Y axis with a differential gear mechanism 38, and moving and controlling two driven ends 26d and 26e reversibly in an axial direction at a swing limit position around the X axis, thereby autonomously curving a tip of the wire 24.

Abstract: The present invention is related to a motion expressible toy featuring an animal character, and more particularly to a motion expressible toy which is capable of expressing emotion or intention by taking the various kinds of body gesture characterized by the independent and the combined mechanism of a mouth, a head, arms and a main body as a whole body, and to thereby characterize a real gesture as a really living character such as a gesture of approval, denial or hesitation related to the communication circumstance, to thereby provide familiarity and curiosity to the children.

Abstract: An angel doll for displaying on a table or mounted on a Christmas tree in Christmas season or such occasion includes a slow transmission device inside a base. The transmission includes a main shaft that drives a palette, two rotating cylinders and two rotating rods, so the palette rotates slowly, and colorful rays can be projected from the lamp inside the base, through the two rotating cylinders, to the margins of the optical fiber wing units. The swinging movement activated by the two rotating cylinders and the two rotating rods through the connecting rods and the side shaft in linkage, causes the wing units and the arm units to swing reciprocally, creating an active and lively atmosphere to the angel doll.

Abstract: An angel doll for displaying on a table or mounted on a Christmas tree in Christmas season or such occasion includes a slow transmission device inside a base. The transmission includes a main shaft that drives a palette, two rotating cylinders and two rotating rods, so the palette rotates slowly, and colorful rays can be projected from the lamp inside the base, through the two rotating cylinders, to the margins of the optical fiber wing units. The swinging movement activated by the two rotating cylinders and the two rotating rods through the connecting rods and the side shaft in linkage, causes the wing units and the arm units to swing reciprocally, creating an active and lively atmosphere to the angel doll.

Abstract: A swing posture doll includes a bent-forward chest member 5 on a waist member 4 supported by a pair of leg members 2, 2a. Right and left arm members 6, 7 are attached to shoulder portions on both sides of the chest member 5 so as to be capable of taking a slightly bent-forward posture. A head portion 9 is provided on the chest member 5, and the chest member 5 is capable of rotating about the shaft which can oscillate in the lateral direction. The right arm member 6 and the left arm member 7 attached to the chest member 5 are formed to be capable of rotating and bending in specified directions. Thus, by applying swinging movement from sports to the arm members 6, 7 while rotating the chest member 5, it is possible to represent a desirable swing.

Abstract: An apparatus including an appendage coupled to a body and a drive. The drive produces a force that causes the appendage to move with respect to the body. When the apparatus is resting on a support surface, the force produced by the drive is insufficient to overcome the force produced by the weight of the apparatus.

Abstract: When a lower component being different size is selectively and removably connected to an upper component, mechanical and electrical connecting means of the upper component is commonly used, and simultaneously they are connected by mechanical and electrical connecting means being the size corresponding to the size of the lower component.

Abstract: The invention relates to the provision of a toy which comprises at least one article which is movable with respect to a play base and objects on the playbase. The article can have at least one part which is movable with respect to the remainder of the article and the movement is achieved via a magnetic arrangement which involves at least one magnet in the movable part of the article and at least one magnet in a movement means such that as the movement means and/or article move in sufficient proximity, the magnetic forces and field created cause movement of the said part of the article to provide an animated feature to the article.

Abstract: A motorized snake includes a chassis having a front end and a rear end with at least one ground contacting drive wheel. A neck is pivotally coupled with the front edge of the chassis to pivot forward and back. A multi section tail including a trailer and at least one follower is coupled with the rear end of the chassis. The trailer has at least one ground contacting wheel and is coupled with the rear end of the chassis to pivot side to side on the rear end of the chassis. The one or more followers are coupled with the rear end of the trailer in a chain to pivot side to side on the rear end of the trailer. A motor or other prime mover in the chassis is driving coupled with the drive wheel to rotate the wheel to propel the snake and simultaneously with the neck so as to move the neck forward and back on the front end of the chassis, and the trailer so as to move the trailer side to side on the rear end of the chassis.

Abstract: A tiny articulation eye and mouth (facial-expression structures) opening and closing structure installable in the hollow interior of a doll head, and utilizing a single, upright-axis motor, and a rotary, co-axial, stepped-diameter drive drum which is rotated by the motor. Circumferential drive tracks formed on the outside of the drum drive followers and actuation which directly impart opening and closing motions in the doll head's eyes and mouth.

Abstract: Multiple component activatable mechanism and toy animals containing such mechanisms. The mechanism that is contained in the animal works mechanically through a series of linkages that control the animal's head and lower jaw to create a forward lunge of the animal and an audible snapping noise from the jaws. In addition, the toy animals can be equipped with a sound module to provide appropriate sounds for the animal, which sound module can be activated anywhere along the linkage of the activatable mechanism.

Abstract: A fashion doll includes a doll body wearing a wedding gown together with an overlying removable princess bodice. The doll further includes a pivotable arm which in turn supports a hand mirror. The outer face of the hand mirror supports a dual image lenticular lens display which transforms the presented image in response to pivotal movement of the doll's arm. The doll further supports a tiara worn upon the doll's head together with a wedding veil which is alternately attachable to the doll's waist and to the tiara. A sound circuit within the doll's body responds to the pivotal movement of the doll's arm to produce a musical tone.

Abstract: A wheel assembly comprises a wheel-mounting base, a wheel, an axle, and two fixing members. The wheel-mounting base comprises a compartment that is delimited by two sidewalls having aligned axle holes. The axle extends through the axle holes of the wheel-mounting base and an axle hole of the wheel received in the compartment. The fixing members are respectively mounted to the sidewalls of the wheel-mounting base. Each fixing member comprises an axle-receiving hole for securely engaging with an associated one of the ends of the axle. Each fixing member is movable between a first angular position in which the fixing member is disengagable from an associated one of the sidewalls of the wheel-mounting base and a second angular position in which the fixing member is securely engaged with the associated one of the sidewalls of the wheel-mounting base.

Abstract: A fashion doll includes a doll body wearing a wedding gown together with an overlying removable princess bodice. The doll further includes a pivotable arm which in turn supports a hand mirror. The outer face of the hand mirror supports a dual image lenticular lens display which transforms the presented image in response to pivotal movement of the doll's arm. The doll further supports a tiara worn upon the doll's head together with a wedding veil which is alternately attachable to the doll's waist and to the tiara. A sound circuit within the doll's body responds to the pivotal movement of the doll's arm to produce a musical tone.

Abstract: This invention discloses a toy doll which can be moved and rotated like a human being. Once a pose is taken the pose is maintained. The toy doll comprises an upper body, an abdomen portion constructed of an upper abdomen and a lower abdomen and a lower body, wherein an interconnecting bar connects the body portions and the abdomen portions which rub against each other and are movable. They are also forced toward the center of the interconnecting bar.

Abstract: A device for collecting treats has a handle having a first end and a second end. A basket is connected to the first end of the handle, the basket including an opening shaped to receive treats. The handle is shaped to allow a user to grasp the second end of the handle and extend the basket to a giver, who drops treats in the basket. The device includes an inflatable sack positioned at the first end of the handle. A feature shaped to resemble a scary creature such as a snake or rat is positioned around the inflatable sack. The device includes a pump. Inflating the inflatable sack with the pump causes the feature to move from a retracted position in which the feature is unobtrusive, to a protruding position in which the feature protrudes from the end of the handle thereby generating a startling effect to the giver. A coil spring attached to the feature then functions to return the feature to the retracted position.

Abstract: A motion toy includes a body member and a head member mounted on the body member. A head drive system is operable to rotate the head member simultaneously up-and-down and side-to-side relative to the body member.

Abstract: A mechanical biped assembly (10) consisting of a base assembly (12) which includes a lower section (14) that is hinged to an upper enclosure (28). Attached to the upper enclosure (28) is a biped body (60) consisting of a pelvic enclosure (62) that is supported by a left leg (102) and a right leg (112) and that has pivotally attached a thorax enclosure (124). The thorax enclosure (124) has pivotally attached a left arm (160), a right arm (170), a rotatable neck (186) to which is pivotally attached a head (200). Within the base assembly (12) and the biped body (60) is located a kinematical linkage mechanism (214) that is activated by a single push of the upper enclosure (28). When the mechanism (214) is activated, the thorax enclosure (124) pivots to the right, which is then subsequently followed by the left arm (160) pivoting upward, the right arm (170) moving to the right, and the head (200) rotating to the left and pivoting upward.

Abstract: An animated children's toy including a gear system for providing intermittent and reciprocal motion. The gear system includes a drive gear and a driven gear. The gear system is adapted to have a non-rotating configuration and an engaged configuration. In the non-rotating configuration the driven gear is prevented from rotating, and a corresponding portion of the animated children's toy is not moving. In the engaged configuration the driven gear rotates and a corresponding portion of the animated children's toy moves.

Abstract: A toy consists of a base, a cap and a toy model. The base has stationary wheels and a movable wheel located on the bottom section thereof. The movable wheel may be driven through a gear set by battery power for moving the base around. The cap has a hollow casing located on the top section to house a motor that is driven by a battery for rotating the cap through another gear set. The base has an arched gear rack located on the top surface. By way of an elastic element and a lever to couple with the gear sets and arched gear rack, the cap may be moved to the left and right, and rotated positively and reversely to generate a wide variety of simulative motions.

Abstract: A decorative-article structure made from winding metallic wires and being rotatable under solar energy, it includes a specifically designed main body formed by winding metallic wires, and includes a solar energy board and a motor at proper positions on the main body, a decorative housing covers the motor, the housing is glued with a patterned sticker formed by laser. When the solar energy board absorbs light source and supplies power for the motor, the motor will drive housing to rotate, the laser formed sticker on the top of the housing will reflect light to generate various colors, the metallic main body will generate vibrations during activating of the motor, and create the feature of extremely interesting visual sensation.

Abstract: A puppet mechanism for moving two legs of a puppet includes an output shaft rotatably extending from a gear box and engaged with a gear reduction device in the gear box. Two disks are respectively connected two ends of the output shaft and each disk has an eccentric protrusion extending therefrom. Two swing members are pivotally connected to two sides of the gear box and each swing member has a slot in which the eccentric protrusion is movably engaged. The swing members are inserted in the two legs of the puppet and are swung when the disks rotate.

Abstract: A magnetically coupled toy system having two toy components such as a doll and nursing bottle is shown. The nursing bottle contains a motor-driven rotating permanent magnet in the nipple portion. A second permanent magnet is mounted in a flexible region around the mouth of a doll. When the nipple containing the rotating magnet is placed in proximity with the mouth of the doll, relative motion between the magnets imparts motion to the mouth and lip regions of the doll.

Abstract: An electric swayable toy includes a body, a shoulder swayably and pivotally on an upper portion of the body, a pair of legs swayably and pivotally mounted on a lower portion of the body, a pair of arms swayably mounted on the shoulder, a head swayably mounted on the shoulder, a pair of shoes swayably supporting the pair of legs in an inclined manner, and a base supporting and securing the pair of shoes. By such an arrangement, the body includes a main swayable mechanism mounted therein, the shoulder includes an arm swayable mechanism, the main swayable mechanism includes a motor which is rotated continuously in a signal direction and the speed of the motor is reduced by a speed reduction mechanism to actuate an eccentric wheel and a cam mechanism so that the legs, the body, and the shoulder are swayable while the arms and the head are swayable by actuation of the arm swayable mechanism.

Abstract: This invention discloses a toy doll which can be moved and rotated like a human being. Once a pose is taken the pose is maintained. The toy doll comprises an upper body, an abdomen portion constructed of an upper abdomen and a lower abdomen and a lower body, wherein an interconnecting bar connects the body portions and the abdomen portions which rub against each other and are movable. They are also forced toward the center of the interconnecting bar.

Abstract: A motion toy includes a body member and a head member mounted on the body member. A head drive system is operable to rotate the head member simultaneously up-and-down and side-to-side relative to the body member.

Abstract: A swinging structure for a mechanical animal includes a housing and a shell. The housing has disposed therein a shaft and a rod. The shaft has an eccentric wheel and a worm gear mounted thereon. The rod is provided with a worm that engages the worm gear. The outer wall of the shaft is provided with at least one post. These posts are fitted with a T-shaped actuated plate. The end of the actuated plate that is connected to the posts is provided with an elongated groove. The opposite end thereof is provided with a pin. The other side of the elongated groove is provided with a notch that can just accommodate the outer edge of the eccentric wheel. The shell is provided with an actuated rod corresponding to the pin. When the eccentric wheel rotates, due to the notch that moves along the outer edge of the eccentric wheel, the actuated plate can oscillate within the elongated groove thereof, and the pin thereon can actuate the actuated rod to cause the shell to oscillate.

Abstract: A Christmas tree shaped toy structure includes a support base, a first actuating set, a scenic base, a second actuating set, a scenic assembly, a housing, and a top hood. The support base includes a hollow support, a battery, and a circular plate. The first actuating set includes a circular first support plate, a circular second support plate, a gear set, and a circular third support plate. The scenic base is secured on the circular plate of the support base for receiving the first actuating set therein. The second actuating set includes a second motor, a second belt gear, a second belt, a plurality of driven gears, an eccentric wheel, two swing arms, and three planetary gears. The scenic assembly includes an annular rack, a curved rotary doll, an annular decorative plate, a circular platform, and two slidable dolls. The housing includes a semi-conic rear hood, and two front hoods. The top hood is secured on the flange of the rear hood of the housing and includes an embedded lamp, and a lighting decoration.

Abstract: A driving apparatus for a doll comprises a battery case containing at least one battery, a circuit board with an electronic switch, two opposite housing halves, and a driving part. Each of the housing halves at an inner wall thereof has an engaging hole, and two flips to form a groove. The driving part further comprises a left casing half, a right casing half, a right casing half, a motor, a speed reduction mechanism, and a swinging cam. The left casing half has an inner straight rail, an engaging projection at the top thereof, and a left engaging projection thereon to fit with the engaging hole. The right casing half has an upper part and a right engaging projection to fit with the engaging hole either. The motor with an output shaft being connects with the electronic switch. The speed reduction mechanism is formed by a belt and/or a gear shaft with an end thereof being associated with the output shaft on the motor and is provided with a swinging gear output shaft.

Abstract: A luminous toy structure includes a lower casing mounted on a base, an upper casing secured on the lower casing and including a rotatable drive rod and two fixed support rods, a support hood for securing the base, the lower casing and the upper casing together, a support disk secured on the two support rods, a swing device having an eccentric wheel secured on the drive rod to rotate therewith, an eccentric rod secured on the eccentric wheel, two arm skeletons each having a pivot shaft pivotally mounted on the support disk, a follower defining an oblong slot receiving the eccentric rod for pivoting the pivot shaft, and an extension bar pivoted with the pivot shaft, a first pivot tube having a first gear, a follower defining an oblong slot receiving the eccentric rod, a second pivot tube having a second gear meshing with the first gear, and two wing bars each secured to one of the first pivot tube and the second pivot tube to pivot therewith.

Abstract: A toy figure supports a pair of arm carriers pivotally secured within the torso interior near the shoulder of the toy figure. Each arm carrier includes an arm attachment apparatus and an inwardly extending arm shaft. A pair of pivot bearings pivotally support the arm shafts for pivotal motion in a horizontal plane. The arm shafts are carried within tight-fitting bores of the pivot bearings to facilitate rotational motion of the arm carriers and the supported arms about the shoulders in a vertical plane. A button is supported within the torso and extends outwardly through an aperture in the rear of the torso. The button is coupled to a pivotable yoke which is coupled to the interior ends of the arm shafts such that pivotal motion of the yoke causes pivotal motion of the arm shafts in a horizontal plane.

Abstract: A motion toy includes a toy body, the toy body having a hollow trunk, a head pivoted to the trunk at a top side, and two legs respectively pivoted to the trunk at two opposite sides, the legs each having a thigh pivoted to the trunk, a foot, and a calf pivotally coupled between the thigh and the foot, a power drive unit formed of a DC motor and gear transmission means and installed in the trunk of the toy body and controlled to turn the thighs of the legs alternatively back and forth and the calves of the legs alternatively up and down, and a battery box installed in the trunk to provide battery power supply to the DC motor.

Abstract: A device for soothing, stimulating, distracting and captivating a child has a body with a rigid body wall defining an interior cavity and including a first circular wall and cylindrical perimeter wall. The first circular wall has an outer surface with a light color and a plurality of indentations formed in the surface configured for casting shadows on the light color of the surface and creating contrast between the shadows and the light color. The indentations are sized and shaped to form a human face including first and second indentations forming eyes and a third indentation forming a mouth to stimulate the child. A pair of broadly rounded protrusions extend from opposite sides of the body forming handles and being generally configured to define human ears. A vibration mechanism is disposed in the interior cavity of the body for vibrating the body. A light source is disposed on the body wall for emitting light. A sound generator is disposed in the interior cavity of the body for emitting sound.

Abstract: A doll includes a pair of arms, a pair of legs and a head supported by a doll torso. One of the doll arms is secured to the torso at a shoulder joint which includes the outer end of an arm movement mechanism. The arm movement mechanism includes an arm shaft pivotally supported at the shoulder joint of the doll at one end and having a ball at the interior end thereof. The arm movement mechanism within the doll further includes a slidably supported traveler having a spring urging the traveler toward one end of its motion. The traveler includes a rearwardly extending lever passing through an aperture formed in the doll torso. The traveler defines a socket which receives the ball end of the arm shaft in a pivotal attachment. As the user moves the lever upon the doll torso, the arm shaft is pivoted causing a corresponding pivotal movement of the doll arm.

Abstract: An ornamental display apparatus suited for the Christmas season having a concealable figurine that is movable from a concealed position to a display position. While the figurine is in the display position, seasonal music is broadcasted. The ornamental display apparatus generally comprises a base, a botanical model, a housing, a figurine, a motorized drive assembly and a music broadcasting means. The botanical model is disposed on the base, and the housing is enclosed within the botanical model. The botanical model is movable between an open and closed position. The figurine resides atop the base and is movable between a concealed position within the housing and an exposed position external to the botanical model. The motorized drive assembly moves the figurine between the concealed and exposed position, as well as the botanical model between the open and closed position.

Abstract: The invention relates to a mechanical model of an animal, especially a toy dog with forelegs and hind legs which are pivotally arranged around a first pivot with a rotation axis perpendicular to the direction of movement of the animal model, wherein the forelegs are articulated by a first drive mechanism with a first gear unit and a first drive axis. Said arrangement is configured in such a way that at least one hind leg is pivotally arranged around a second pivot, wherein the rotation axes of the hind leg are tilted in relation to each other at a given angle and a second drive mechanism is provided for selectable movement of the hind leg around the second pivot.

Abstract: A mechanism adaptable for a toy provides a hugging motion to a pair of arms extending outward from each side of a rear body member. A front body member is supported by a bottom hinge in V-shaped hinged relation in front of the rear body member. Each arm is comprised of an upper arm and a relatively long forearm supported in hinged relation on the outer end of the upper arm. For each arm, a wide, elongated, yielding forearm actuator is hingedly attached on its outer end to the forearm and on its inner end to the front body member. A hand is hingedly supported on the outward end of the forearm. Supported in front of the forearm is an elongated, yielding hand actuator adapted to move the hand when the forearm actuator is moved toward the forearm. Squeezing the body portions together causes the forearm actuators to pivot the forearms forward in a hugging motion.

Abstract: A motion toy includes a toy body having an upper part and a lower part pivotally connected together, and a power drive coupled between the upper part and the lower part of the toy body. The power drive is controlled to tilt the upper part and the lower part of the toy body alternatively inward and outward in reversed directions.

Abstract: The invention relates to a toy having a play base and an article typically depicting a human or animal character which is movable along said play base by manipulation of magnetic or mechanical mechanism which, preferably, are not in direct contact with said article and hidden from view, and said play base includes one or a number of sets which depict an environment such as a shop, park etc and which include objects which are movable by separate magnetic movable or mechanical mechanism contacted by the magnetic or mechanical mechanism to give the effect that the object is moved by the article when it is moved into proximity with the same thereby adding to the impression to a child of the article being independently animated.

Abstract: A toy figure torso supports at least one pivotal arm together with a spring-loaded mechanism urging the arm toward pivotal motion in a forward direction. A spring is coupled to the arm and provides the urging force. A trigger and latch mechanism is supported within the torso of the toy figure and is operable by a push button supported at the torso rear. The mechanism includes a cooperating lock arm and a cam which engage to inhibit return motion when the toy figure arm is raised to the cocked position. Energy is stored in the spring which is released by activation of the push button allowing rapid forwardly pivoting motion of the arm.

Abstract: A motion toy includes a frame structure covered with a decorated shell and a power drive controlled to move parts of the frame structure. The frame structure has two vertical upper side boards and two vertical lower side boards hinged together, a horizontal shoulder board coupled between the vertical side boards at the top, a horizontal upper link coupled between the vertical upper side boards and the vertical lower side boards, and a horizontal bottom link coupled between the vertical lower side boards at the bottom side. This bottom link is reciprocated by the power drive. Each vertical upper side boards has a respective sector gear respectively meshed with a respective sector gear on the vertical lower side boards.

Abstract: A cat toy formed from a soft, breathable material which will pass the aroma of catnip. A closable flexible pouch for catnip is formed at the bottom of the body and a vibratory motor is positioned in contact with the pouch to impart vibratory energy to the pouch and propel the cat toy. The vibratory motor may be activated by a pull cord which extends externally of the body of the cat toy.

Abstract: A toy figure includes a body, a pair of wings, a pair of legs, a tail, and a head converted to generally resemble a bird or other flying creature. The legs and wings are pivotally mounted to the body using a mechanism by which the pivotal movement of the legs in response to the user squeezing and releasing them repeatedly produces a corresponding wing-flapping action. A spring urges the wings to a raised position and urges the legs to a spread position. The head is pivotally supported by the body and a cam follower and cam arrangement couples the head to the wing movement apparatus such that the head moves side-to-side simultaneous with the wing-flapping movement.

Abstract: A toy includes a platform, a moving body, and a balance bar. The moving body has front and rear wheels rotatable about horizontal rotary axes, a turning wheel, and a drive unit coupled to the turning wheel and one of the rear wheels to drive movement of the moving body when the moving body is disposed on the platform. The turning wheel is rotatable about an axis perpendicular to the rotary axes of the front and rear wheels, and prevents the moving body from falling off the platform when the moving body moves to a peripheral edge of the platform. The balance bar has an intermediate fulcrum portion mounted pivotally on the moving body about a horizontal pivot axis, and two arm portions projecting from two opposite lateral sides of the moving body.