Among the thousands of Internet radio stations, this four-inch cube radio tunes in only to the favorites you select from your PC. Rest it on one of four sides, and accelerometers signal it to switch between four presets of your choosing. Tipping it back and forth adjusts the volume. Price not set
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.