Today, geodesic domes are found on playgrounds, homes, over radar installations, storage facilities, at Disney's Epcot Center, and at World's Fairs. The inventor of the design, Buckminster Fuller, thought that geodesic domes could be used to cover large areas and even designed one to cover all of New York's Manhattan Island. This article details an activity that gives students a great opportunity to explore the basic math, science, and technological principles related to the design and construction of structures. They will also investigate the advantages and disadvantages of dome construction. (Contains 3 figures and 15 online resources.)