POWERED BY WATER. AND IMAGINATION. Gears + oil = a mess. Gears + water = hours of bath time fun. COGS suction to the bath walls and spin when water is poured over them. Positioned just right, they work like a fine-tuned machine. (No oil included or needed!) Features Spinning gears suction to bath walls Linked gears create a water-powered chain Includes 5 unique gears Can be used with Boon PIPES for even more fun! Made without BPA Recommended age: 12m+ Care & Cleaning Wash thoroughly before initial use and periodically. Hand wash in warm, soapy water. Rinse with clear water and air dry.