Keep your feet warm and your drinks cold with the help of some rechargeable insoles and a hyper-insulated water bottle and round up some friends for a welt-free BB-gun fight with the new Xploderz Retaliator 2000. Or relax in your home theater with a new split-screen projector from Epson. No need to worry about refilling the bird feeder—the new one from Wingscapes can take care of itself.
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.