Hollow Cube is the newest technical innovation in twisty puzzles. With no core inside and revealing how the segments move, this cube is surprisingly unique. Beautiful design but no less difficult than a normal cube.
Twist and tun to scramble the colours. Then try to make one solid colour per face.
We have based this proposed classification of toys on recent studies and investigations, as well as recent domestic and international classification systems. Our proposal aims to be coherent, unified and practical at all times.