IQ'biki

IQ'biki is 3D puzzle. Your objective is to rotate cubes so that each face of the pyramid includes all 4 colors. If you are familiar with the puzzle "Instant Insanity", you can do it. It will be useful for students studying graph theory and for fans of difficult tasks.
IQ'biki contains all possible combinations of puzzles consists of four cubes, each of whose sides is colored with one of four colors. It contains more than a thousand unique nonisomorphic sets of four cubes.