Hanayama Huzzle provides solid Cast Metal puzzles for adults which are solved using a blend of inspiration and logic. A quarter of this cake has been cut away showing three identical layers inside. This puzzle looks simple but it is very ingenious.The challenge is to take the puzzle apart and put it back together. Simple yet so deep. You will need your hands and your brain on board to solve the huzzle puzzles! * DIFFICULTY LEVEL: 4 (Hard)