Many different 3D puzzles - from simple to master levels.
Mirror Cube, Magic Cube, Pyraminx and Skewb Diamond.
Different levels of complexity - 2x2x2, 3x3x3, 4x4x4, 5x5x5, 6x6x6, 7x7x7, 8x8x8, 9x9x9, 10x10x10, and 11x11x11.
It is remarkable both for fun and for learning.
