Variable three dimensional puzzle, has blocks containing tunnels which can be rotated so that a ball runs from an entrance and out of puzzle via exit

摘要

The puzzle comprises a base with fixing rods secured on the outside, as well as middle blocks (2), side blocks (3) and corner blocks (4), each block containing a tunnel with more than one exit. The middle blocks include a holding part for the end a rod. The side and corner blocks include an integral pivoting connection part which is pivotally mounted between the base and middle blocks. A ball can enter the tunnel network via an entrance hole (24) and can be made to run along the tunnels by rotating the blocks, until it finds its way out of the puzzle via an exit hole (23). The entrance and exit holes are provided in different blocks.