This Lego Mindstorms NXT model can deliver vitamins. It was created by developer-program member Dave Schilling.

Steve Hassenplug (left), a member of the Lego Mindstorms NXT developer program, plays with his latest concoction, a three-wheeled robot called Omni.

Microsoft Windows Mobile software developer Brian Cross built a Lego Mindstorms NXT robot that communicates and moves based on instructions received by a Windows Mobile cell phone.

This Lego Mindstorms NXT robot is built to sweep up dirt and dust off floors using a Swiffer.

Chris Anderson, editor in chief of Wired Magazine, works on putting together the Lego Mindstorms NXT model that his children and some friends built. Anderson was taking part in the “big robot on campus” tour of technology companies at its stop at Wired in San Francisco on July 20.