CONSTRUCTIONAL TOY

A constructional toy comprising a plurality of elements (10, 40, 40', 60, 100, 300, 202, 302, 304, 400, 500) which can be assembled together to form a variety of three dimensional rotatable structures. The said elements include a first gear wheel element (10, 40, 40', 60, 400, 500) having a wall (14) which defines a side face of the first gear wheel element and a circumferential edge (16) of the first gear wheel element. A plurality of gear teeth (18) are provided around the circumferential edge of the first gear wheel element for driveable engagement with a second gear wheel element having gear teeth complementary in shape to the gear teeth of the first gear wheel element. There is also provided a first aperture (20) provided in the wall configured to receive a drive element (100, 200, 202). In use the drive element will driveably engage with gear wheel via the aperture to provide a means for transmitting force to the first gear wheel element to thereby rotate the first gear wheel about a rotational axis which is aligned with or coaxial with a central rotational axis of the first gear wheel.