Originally designed by TV developer Philo T. Farnsworth as a device to create nuclear fusion, the fusor is unique in its simplicity. Instead of slowly heating plasma, the fusor simply injects “high temperature” ions directly into a reaction chamber. Still, engineers have been unable to develop a practical power source using the technology. Hobbyists and even high school students have built small fusors over the years. The youngest person ever to build a working fusor was how old? Discuss