The Hydropower Kit by Thames & Kosmos , teaches children the science of water energy with twelve experiments and building projects. The power of water is one of the oldest sources of energy, and one which is completely renewable and natural. This cutting-edge science kit is dedicated to the science of water energy. Explore the power of water by building models and conducting experiments with them. Learn about how different devices are used to extract useful energy from moving water — from a waterwheel in a small stream to a giant turbine in a tidal power station. Build a waterwheel, a saw mill, and a hammer mill to harness the energy of moving water to do different types of physical work. Also learn about water pressure by building a water tower, communicating vessels, and a water fountain. Your child will have a great time constructing a hydroelectric power station to generate electricity and light an LED.