Abstract: The present disclosure is directed to a wheel set for toy rail vehicles having wheels with rims extending radially from hubs which are mounted on a smooth axle passed through a hole in the chassis of the vehicle. A spring disc with a cover is fitted on the axle end and clutched by the wheel hub provided with a constricted opening recess, thereby retaining the wheels on the axle.

Abstract: The problem of providing a greater tolerance in the hole diameters of toy blocks held together by frictionally fitting resiliently deformable connector elements is resolved by connector structural features. Thus, the connector element has a hollow cylindrical body of resiliently deformable plastic with separate slots extending axially along the cylindrical circumferential walls on diametrically opposite sides of the cylindrical body and at opposite ends. This provides independent conformation to mating block holes for each end so that entry of one end into a smaller hole will not deform the connector to decrease friction at the opposite end, and thus a tight fit will result in a larger hole.

Abstract: An element for detachably interconnecting toy units comprises two tubular parts separated by a radially extending flange.The element is resilient in radial directions and each of its two parts is between its ends provided with sections having reduced outer diameter.