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 (though not well-oiled) machine. Use Cogs with Pipes Bath Toys for maximum fun. Gear heads unite!
Can be used with Boon Pipes for even more fun! Pipes sold separately.