Thanks for the links, I'll follow them!
I also took your advice about the RC car and found an old RC Jeep under my desk. I've removed the top half of the chassis, ripped out the circuit board, and modified the battery compartment to support the Arduino Uno. I want to connect the two motors (as far as I can tell, the front motor turns the two front wheels left and right and the back motor rotates the two back wheels) to the Arduino, but I don't really know how. I assume I'll need to buy a Motor Shield? Will I need some adapter cables to connect the RC motor cables to the Shield? What type of adapter cables? Or do I just pull the white plug off the cables and attach the wires directly to the Motor Shield? Is there anything else I should know about using this Jeep with the Uno?
Thanks for all your help so far!
Pictures:
Modded RC Jeep
Jeep with Uno resting inside
Motor that spins the two back wheels
Motor that turns the two front wheels left and right
The white plug which houses the ends of the two cables on each motor
Another camera angle of the white plug
Yet another camera angle