1) A high school student has designed a simple gravity drive that uses the energy from a small lift of a ball or coin on a wheel to create a large rotation of the wheel. 2) The design involves popping a ball or coin out of the wheel at a 10.55 position, allowing it to fall and drive the wheel most of the way around, then lifting it back to the 12.01 start position, extracting more energy out than was used for the small lift. 3) The student proposes that the design could be easily built by any high school and could generate up to 1kw per hour of power, enough to run a small device or caravan.