Interactive learning toy that you and your child will have a lasting bonding experience. Just fill the tank up with water from the tub while running the bath and suction the tree house to a dry flat surface on the shower wall. Use the cup to keep this experience alive as the water begins to flow through the rotating propellers. Wonderful sensory bathing fun while your child develops the ability to become more aware of how water works. When the tank is filled with water, you can rotate the bird and watch as the water sprinkles out! Fill up the cup shaped bird and the water sprays out the grey bird. Providing cognitive skills used as your child will come back to the bathtub and remember what these birds can do. Wind up the frog and watch him swim on its back through the tub, wind up and watch the penguin swim through the bubbles and water. No batteries necessary! Easy to operate-Once the tank is full you can use the cup provided to keep the water flowing. For the best suction to the bathtub or shower wall, use a dry, flat surface. You can even take this toy to the pool! How much fun will they have while swimming along with the frog and penguin while filling up the tank with the cup.