This is a wooden puzzle for brain training. It's a puzzle where you remove the string hanging on a wooden frame with a complex structure. There is an illustration of how to solve it, but it's quite difficult. It also tests your dexterity. I opened it for the photos, but it's unused. There is a dent on the top of the box. The string is in its original position. - Material: Wood - Type: Puzzle Toy - Recommended Age: 36+ Months - Color: Natural Wood - Components: Includes beads and string Thank you for looking.