The YuXin Treasure Box 3x3 is a jumbo-sized 3x3 that has been specially designed for romantic settings and proposals. The puzzle features love-themed artwork printed on all 6 sides in different colors and a hollow ball inside the puzzle that is designed to hold the items intended to surprise the gift recipient. On the red face with the logo, there is a special button that can be pressed to allow the side to be twisted off and removed, revealing the contents of the treasure box. A little fancy ring is already included inside the treasure box. The YuXin 3x3 Treasure Box is a 3x3 with a compartment in the center where you can store small personal items In order to open the compartment, simply get the puzzle in a solved state and push down on the white center cap. Once it locks into place, unscrew that layer. In order to reassemble the puzzle and reset the center cap, screw the layer back onto the puzzle securely and pull gently on that layer.