Six, colorful, wooden gears of varying sizes fit together as a flat puzzle but also rotate and stack to make sculptural towers. Each gear is labeled with its color name in English on one side and Spanish, German and French on the other, making this a fun, teaching tool. The puzzle includes a wooden tray for display and storage. The Gear Stacker Puzzle is made from eco-friendly rubberwood with child-safe stains and recommended for children ages 2 and up.