21 Step Japanese Puzzle Box Aka Fuji - Puzzle Box
High-quality 5 Sun 21 Step Japanese Puzzle Box with mount Fuji pattern on the lid and origami bird pattern on the back. You need to unlock several sliding panels in a specific order before you can open the box. The parts will move easily and smoothly if you do it the right way. When the mechanism moves in order, the lid will open to the 21st step. After you successfully open the box you will find a small secret space inside the lid!