Get the car-eye view from a camera in the hood of new Hot Wheels racecars. These 1:64-scale models capture up to 12 minutes of YouTube-ready video. Play it back on a one-inch LCD on the lower chassis, or transfer it via USB.
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.