SmartGames Happy Cube ExpertHappy Cube Expert is the most challenging puzzle in the Happy Cube family perfect for seasoned puzzlers looking for a real brain teaser! This product contains one single Happy Cube Expert puzzle, made from beautiful marbled foam and designed with its own distinct colour, shapes, and unique solution. Ready to test your skills? Try building the 3D cube using all six foam pieces, then take on the next challenge: fitting them back into the flat 2D frame.