Karakuri Small Box #6 was created based on "Top Box" (M-5-1). People who know the "Top Box" will have already understood the answer. If you don't know, perhaps it is difficult to open. Can you imagine the answer from the title? Maybe you need a slight skill to open it, because we made it as a small size work. Maybe you also had better use a desk. If anything, you had better play on the carpet.