Unlocking the secret of this diabolical wooden box has nothing to do with luck. According to its creator, Akio Kamei, this walnut masterpiece can't be opened "if you don't enjoy humor." One of the most perplexing yet logical puzzle boxes in the world.
Extremely limited quantities. Measures 3.5 inches.
Difficulty Level: 7 of 10 | Materials: Walnut | Handmade in Japan