This activity is designed for secondary school students. The process of constructing a model solar building includes consideration of many fundamental scientific principles, such as the nature of heat, light, electricity, and energy conversion technology. When the model solar building is completed, there are numerous possibilities for the use of the model for studies of the principles of energy conversion. Included are a description of needed materials and equipment, construction tips, diagrams to assist in the construction procedures, suggested uses of the model, and selected references. (RH)