It's easy to make a deposit - but just TRY to make a withdrawal. Challenging acrylic box is a great way to give gifts such as money, gift cards, rings, watches, and small jewelry, because the recipient must first solve the tantalizing maze to open the box and retrieve their treasure! Full instructions included in case they give up. Inside gift compartment is 3 inches high x 2.25 inches wide. Puzzle itself is 3.5 inches square.