From my Amazon aStore:
This kit is supplied with pre-punched boards, gears, shafts, switch, motor, battery holder, and all necessary parts. Includes easy-to-follow instructions. Requires 2 "AA" batteries, screwdriver and long nose pliers.
Check out the Robomech from Elenco.
Also check out all of the motorized mechanical toys I've loaded into The Automata / Automaton aStore.