Nothing brings out the best in eighth-grade physical science students quite like an engineering challenge. The wind turbine design challenge described in this article has proved to be a favorite among students with its focus on teamwork and creativity and its (almost) sneaky reinforcement of numerous physics concepts. For this activity, pairs of students are challenged to build a set of blades that will capture wind energy and cause a small motor (acting as a generator) to spin, thereby creating electricity. This activity introduces students to the pros and cons of a renewable energy source, allowing them to experience how energy can change form from mechanical to electrical. The amount of electricity created is measured with a multimeter, and the group whose design generates the most electricity wins. (Contains 4 figures and 3 online resources.)