Abstract: A wheeled toy includes a longitudinally extending chassis and at least one wheel assembly mounted in said chassis. The chassis includes cylindrical bearing wires mounted adjacent opposite sides thereof and oriented longitudinally thereof, while the wheel assembly includes a cylindrical axle transverse to the chassis and a pair of wheels at opposite ends of the axle. The bearing wires of the chassis are positioned above and perpendicular to the axle, contacting the axle at point contacts, and transmitting the weight of the chassis through the point contacts to the wheel assembly.

Abstract: A system for coupling two parts together, the system being composed of two coupling members each fixable to a respective part, each coupling member including: a support piece; a male element projecting from the support piece; and a female element formed in the support piece to define a receptacle. The male element and the female element each has a central axis and the central axes extend parallel to one another, the male element has a cylindrical shank and a rounded tip portion each coaxial with the central axis of the male element, the tip portion having a diameter greater than that of the shank and being separated from the support piece by the shank, the female element is defined by an opening and is provided with a plurality of radially inwardly extending, resiliently deformable teeth spaced apart around the circumference of the opening and circumscribing a circle having a diameter not greater than the diameter of the shank, and the female element is formed to be mateable with the male element.