ServoBot by Christian Vlaskowis

ServoBot is an four wheel drived joystick operated robot which
I put together with parts left over from other electronic 
construction projects.  It is controlled by an pre-programmed
Basic stamp and powered from two recharchable battery packs for
the four servos and a 9v battery for the computer.  It has a
small gripper, yet without the ability too close and open,
attached by it's side to a dc motor gearbox.

It costs about $150 and took me about one week to build.