Amazon.com: WiFi Smart Robot Car Kit with UNO R3, Line Tracking and Obstacle Avoidance Ultrasonic Sensor, HD Camera Wireless RC Intelligent Educational Toy Car Robotic Kit for Arduino Learner (Upgraded Version) :
Parallax Shield Robot con Arduino UNO | Tech Maker
Arduino 2wd kit smart robotics car - www.adrirobot.it
Mini DFRobotShop Rover Kit (Arduino Uno) - RobotShop