Power House Kit: Grades 5 and up. With this kit students learn about alternative energy and sustainable living by conducting experiments and building energy related models. The 10 building projects include the power house itself, a greenhouse,a solar cell array,a passive solar collector, a solar oven, an air conditioner, a refrigerator,a hydrometer, a lemon battery and a wind power generator. The projects emphasize important concepts such as heat transfer, active and passive solar energy, power storage and converting mechanical energy into electrical energy. As students perform the experiments,they read diary entries of a fictional group of young explorers who are learning to live a sustainable existence on an island. To survive the group must implement real world versions of the projects students are doing with the kit.