Abstract: A cardan joint is provided for transmitting rotation between first and second parts of a toy building set. A first rotating part consists of a shaft having a coupler head at one end in the form of flaps which project radially outwardly with respect to the shaft axis and which form spherical segments of a cardan ball. A second rotating part includes a cavity into which the coupling head of the first part fits. Carrier pins extend radially inwardly into the cavity to mesh between and be displaced along the flaps so that the coupler head with the flap may be tiltable about at least one pin.

Abstract: A tool (20) for use in the separation of elements in a building set, said elements having a face provided with coupling means which have a wall part extending transversely to the face, and which are preferably disposed in parallel with a side edge, comprises a lever (25) and a gripper means. The gripper means is disposed at one end of the lever and comprises a first jaw area (21,23) intended to tightly engage the side edge of the element, and a second jaw area (22,24) intended to tightly engage the portion of the wall part of said coupling means which faces away from said side edge. The gripper means may moreover comprise complementary coupling means for at least some of said coupling means.

Abstract: A steering mechanism for toy building sets, such as toy vehicles, and of the type comprising a rack means and a pinion cooperating with it. In connection with various possible positions of the rack means and likewise with a view to selective positioning of the pinion cooperating with it, the toothed region of the rack means is provided wholly or partly around the longitudinal axis of the rack means, the rack means being integral with a pair of steering rods which are provided with coupling means.