You don’t need to be a master to build a robot. It can be build out of various parts you’ll probably find at home. SO here it is – a cool robot that simply wanders around and avoids obstacles with sharp IR range finder.
Other parts include: couple modified servos for continuous rotation, black&decker battery pack shich serves as robot base, wheels and arduino diecimila as robot brain. All parts are hot glued in to one piece. Great project to do with a kid.