This unit provides students the opportunity to explore methods engineers have devised for harnessing sunlight to generate power. Students will initially explore heat transfer and heat storage through the construction, testing, and eventual use of a solar oven. With a lesson focused on photovoltaic cells, students will learn the concepts of energy conversion, conservation of energy, current, and voltage. Through construction of model solar powered cars, students can see these conceptual ideas manifested in modern technology. Furthermore, the solar car project provides opportunities to explore a number of other topics, such as gear ratios and simple mechanics. Both of these design and construction projects are examples of engineering design.