This Blue Octagon Chassis makes for an excellent robot body that's easy to machine and modify. It's a single piece of 4mm thick plastic, with a variety of holes, slots and cutouts for mounting boards, sensors, and servos. The sides are notched to fit two DC Gear 'TT' motors - you'll want to get four M3 or 4-40 screws about 24mm/1.0" long to mount the motors. At either end you can screw on a ball caster. You can build a very sturdy (and quite handsome!) medium-sized robot rover with this frame.
Remember, this is just the plastic frame chassis! Motors, wheels, motor driver, microcontroller, etc are not included!
You'll probably want to also pick up the following to complete the robot body.
Then you will also need a microcontroller and motor driver that can drive the 5V DC motors. We recommend one of the following:
A matching microcontroller or microcomputer is also required!