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.