Hydropower is the largest source of renewable energy. This renewable source of energy provides 10% of the nation’s electricity. As of now, there are 77,000 Megawatts of hydropower, enough to provide 35 million homes with energy. Converting flowing water into usable energy produces hydropower. Most of this water comes from rivers and is released through turbines to produce energy. Although this power source does not release pollution, it can possibly harm fish and wildlife, displace people, and alter the quality of water.
There is a really great HydroPower Kit for kids by Thames & Kosmos; you can find it at http://www.kazootoys.com/thames-kosmos-hydropower-science-kit.html