Hi! I'm the boyfriend 
I'm a noob on electronics, robotics and arduino.
I decided to register myself beacuse it woulb me a lot easier.
I think the motor i'm using runs on 6V but on 5V works just fine.
I've tried 3V ones, but the ones i have don't have any kind of cogs or gearbox so they dont have enough power to move the system.
I'm not using any kind of H-bridge, or driver shield. Do I realy need to?
The purpose is to make a vehicle run using some "Processing" code, which basically consists of key strokes sending different values trough serial and those would change movement mode
Later today i'll post both arduino and processing code.
thanks for the help.