The 5 Sun 21-Step Japanese Puzzle Box is a masterpiece! A true work of art! Hand-crafted in the Yosegi fashion, this puzzle box is made by the Izumiya Studio in Japan. The goal is to operate the sliding, wooden panels in a particular order so that the lid will open on the 21st step. There is no need to use any force while solving, the panels will move smoothly if you are solving the puzzle correctly. Once solved, there is space inside to hide items as a prize for finishing! The process of making these artistic marvels is a grand style of woodwork handed down through the generations in Japanese culture, dating as far back as the Meiji era.