Made up of pieces sporting radically different shapes and sizes, the Ghost Cube Puzzle’s uniform white color makes it surprisingly tough to solve. Twist it into all kinds of shapes, then try to get it back into its original square design—this brain teaser's unusually large set of possible solutions make it a challenge for adults as well as kids. Expert gamers and beginners alike will appreciate the Ghost Cube Puzzle, a sinister twist on the traditional gaming cube, designed by the legendary German puzzle inventor Uwe Meffert. Ages 9+