A water activity center that attaches to the tub and generates a double chain reaction of amazing water effects. Enhance STEM-based learning by introducing young "scientists" to the fundamental concepts of physics and mathematics, using the power of water. The transparent water laboratory allows your child to see the double cross-chain reaction of amazing water effects in action! Comes with two great lab accessories: A volume mark test tube container. A detachable funnel for filling, pouring and playing. By filling the test tube with water and pouring it into the funnel of the water meter, the water meter spins quickly and creates 10 amazing sprays of water from the connecting pipe. By pouring water into the detachable funnel, the googly eyes will roll wildly, as a stream of water flows from the mouth and to the other side of the pipeline, spinning the propeller. The water lab attaches to the tub for easy play.