WALTHAM, Massachusetts (CNN) -- Programming a robot to spot a puck, pick it up and carry it "home" is simple enough in the age of computers.

CNN: Robots learn group dynamics - Sept. 26, 1995

But successive projects show you how to make my Rover by adding touch, light and ultrasound sensors that let the robot respond to its environment--plus a grabber that can pick things up.

FORBES: BYOB: Build Your Own Bot