Constantin Brass Trap

The Brass Trap is a small puzzle that can hold a coin. But first, you need to figure out how to open it. Once you’ve done that, you can place a coin inside. If you then give it to someone else to open, they can see the coin but can’t get it out—or can they? This is the kind of brainteaser that’s easy to take with you and is sure to amaze everyone.

Age: 8+
Difficulty: 3 stars