I started by designing a miniature bumper car body with a two by two-by-two-inch footprint including a main chassis and a top cover plate secured by four screws. I set up a two-wheel differential drive system combined with a single internal front ball caster for stability making sure the wheels and caster aligned perfectly on the floor plane. Then I selected a six volt five hundred RPM N20 micro gearmotor from Pololu which has an extended rear shaft. I downloaded the official CAD files and successfully identified the correct part file to bring into my Autodesk Inventor assembly. After analyzing how the motors fit inside the tight chassis space I realized they are too long to sit end to end in a straight line. I drew up a staggered layout concept with gears to figure out how to transfer power to the wheels and I am now deciding on the best direct drive arrangement to lock the motors into the chassis without needing extra parts.