Safeinu Transparent Crystal Money Maze Coin Bank 3D Puzzle Box Gift Holder Prize Storage Green The only way to open it (or make a withdrawal) is to maneuver the ball bearing through the maze to pop open the lid With a compartment inside which could hold coins, small gifts, gift cards, letters, or even an engagement ring Perfect holder of those difficult-to-buy-for-person gifts, and you can tease the receiver with it Ideal intellectual toy and stress releasing tool Physical size:9*9*9cm;Internal capacity:7.5*7.5*7.5cm