Abstract: A toy construction block kit is disclosed. The basic unit of the toy construction block unit has three basic sides, with two side walls and a connecting wall. Each of the two side walls have ‘tongues” extending from their interior sides. The back connecting wall has means for reversibly capturing the tongues. The construction block units have two tongues that stick out from opposing walls, and a distal part which contains a double receiving clip. As each construction block unit has the two tongues and a double receiving clip, when two blocks are pushed together, they double lock. The construction block unit can be attached to one or more other construction block units, or could be attached to a blank cube.

Abstract: A toy construction block kit is disclosed. The basic unit of the toy construction block unit has three basic sides, with two side walls and a connecting wall. Each of the two side walls have ‘tongues” extending from their interior sides. The back connecting wall has means for reversibly capturing the tongues. The construction block units have two tongues that stick out from opposing walls, and a distal part which contains a double receiving clip. As each construction block unit has the two tongues and a double receiving clip, when two blocks are pushed together, they double lock. The construction block unit can be attached to one or more other construction block units, or could be attached to a blank cube.

Abstract: A construction system includes a plurality of construction elements having body member and a plurality of coupling members, each of said coupling members having an exterior portion and an interior locking device of hermaphroditic type. The interior locking device includes protrusions and a receiving block. A first coupling member belonging to one construction element can interlock with a second coupling member belonging to another element, so that the protrusions of the first coupling member resiliently deflect away from each other and subsequently retract, and settle, into provided recesses in the receiving block of the second element. Concurrently, the protrusions of the second coupling member settle into corresponding recesses in the receiving block of the first coupling member. Applications of the construction system in toy construction sets, construction puzzles and board games are provided.

Abstract: A construction system includes a plurality of construction elements having body member and a plurality of coupling members, each of said coupling members having an exterior portion and an interior locking device of hermaphroditic type. The interior locking device includes protrusions and a receiving block. A first coupling member belonging to one construction element can interlock with a second coupling member belonging to another element, so that the protrusions of the first coupling member resiliently deflect away from each other and subsequently retract, and settle, into provided recesses in the receiving block of the second element. Concurrently, the protrusions of the second coupling member settle into corresponding recesses in the receiving block of the first coupling member. Applications of the construction system in toy construction sets, construction puzzles and board games are provided.

Abstract: An entertainment device comprising a plurality of rotational member divided into two groups: triangular members 10 and pentagonal members 20, a plurality of arcuate movable pieces 30 and a base for rotatably supporting said triangular and pentagonal members. The respective axes of rotation of said triangular and pentagonal members intersect at a common point representing the center of the exterior spherical surface of the device. The triangular and the pentagonal members are symmetrically disposed with regards to said center, wherein each triangular member is centrally positioned between three pentagonal members, and each pentagonal member is centrally positioned between five triangular members. Moveable pieces are disposed and slidably attached in the areas between a triangular and a corresponding neighboring pentagonal member, wherein a subsequent rotation of the triangular and pentagonal members results in changing the disposal of the moveable pieces relative to the center.

Abstract: A rotating spheres puzzle is comprised of plurality of overlapping spherical figures (10), each of which is rotatable about three mutually orthogonal axes with its center as a pivot point, and each of which comprises a base (11) and a plurality of pieces (12) distributed symmetrically on the periphery of the base. The pieces are shareable with neighboring figures and can be moved into corresponding positions in other spherical figures including the overlapping areas by sequentially rotating the figures in predetermined angular increments. The spherical figures are arranged to form a three dimensional matrix of spherical figures, and are surrounded and encased by a housing (14, 15 and 16). The housing has a plurality of openings so as to enable a manual rotation of the spherical figures.