The Skull 3D Crystal Puzzle is a sleek， translucent， crystalline puzzle with 50 unique interlocking piecesTake puzzling to a whole new dimension with this edgy and trendy designEnjoyable to work on， challenging to complete and beautiful to displayThis 3D puzzle has a difficulty level of 2 and is fun for puzzlers age 12 and upApproximate assembled size 8.5*7cm