Seeing as Arduino is good for controlling motors and sensors, Randy added a PING ultrasonic sensor ... for a remote altogether, and use the sensors to make the car follow you around.

Living proof is this human-following robot/car that was build ... In addition to the Arduino, you’ll need the four wheels, batteries, infrared and ultrasonic sensors, jumper wires, a DC power ...

The Smart Car Follower Project ... control allowing the robot to chase the user around like a puppy. The whole thing also comes with obstacle avoidance using ultrasonic sensors on all sides ...