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!) Use COGS with PIPES or TUBES Bath Toys for maximum fun in the bathtub! Gear heads unite! 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!