If you've ever thought it'd be cool to make your own robot but didn't because your options were Legos (ho-hum) or fabricating one from scratch (who's got the time?), listen up: RadioShack's new Vex Robotics Design System (vexrobotics.com) is the ultimate compromise. The $300 kit contains more than 500 parts, including steel plates, motors, radio receivers and a six-channel remote. What to build? That's up to you.
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.