End the school year with an engaging, challenging and tasty project. Building solar ovens incorporates the engineering design process, an understanding of energy transfer and of the planet's energy resources. It is also a great opportunity to discuss the greenhouse effect and its impacts on our climate. All this project needs is a few days in class, some materials from the recycling bin, and some sunshine. The end of the year is a great time for this. Students will get a kick out of seeing their