Quantity   Component name
2 × DC motors To drive his little tank treads
1 × L293D Motor Driver To drive the DC motors that drive his little tank treads
3 × Distance sensors Ultrasonic front and back under his body + IR under his eyes?
1 × Tilt sensor To call for help when falling over
1 × Acceleration sensor To sense when it's picked up or moved around
1 × Compass For use in case of advanced navigation if it came to that
1 × Wall-E U Command toy It's rare and therefore expensive, still looking for a good price
1 × Espruino My robot platform of choice