 The Thames & Kosmos Electronics Workshop is an amazing Introduction to Electronics Kit. 148 experiments from simple circuits to digital logic. $109.95 Sale! $98.96 |  Wind Power Sience Kit is a great tool to learn about renewable energy. You can build a wind turbine to generate electricity, and conduct more than 20 experiments with your wind turbine. $49.95 Sale! $44.96 |  Fuel Cell X7 Hydrogen Powered Car runs on water. With this science kit, you can build a model car that runs on hydrogen gas using a unique reversible fuel cell. $119.95 Sale! $107.96 |