The Bathly toy consist of two parts. The top part, the sprinkler is waterproof and must be left to dry out after each use. Take the batteries out of the compartment after each use in water. Make sure you seal the compartment tight and rubber seal is undamaged to prevent water leaking inside. The bottom part (if purchased), the base is not waterproof, and it must not be used in the water to prevent the damage. The base is designed to work only on the hard floors. Inspect and clean the base wheels after each use to prevent dust building up around the wheels.