No, it's not a theremin--it's better. The Beamz Interactive Music System plays like a virtual harp. Three LED beams span across each of its forks, each emulating a different musical instrument that you select using the accompanying PC software. Start off by playing along with pre-programmed tunes, and then you can move on to create, mix and record your own tracks.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.