One of the many broken toys scavenged from Goodwill. I took this 3 wheeled monster that was missing its remote and gutted everything but the motors. Then I used the motor shield from the good people at Adafruit Industries and an Arduino board as a replacement control board. I scoured the web for tutorials on programming arduino for mecanum wheel drive and did a little creative modification to get this thing to work. Soon I will ad a top cover to conceal the innards and throw on a servo gimbal for holding a small camera.