$49.99 - Arduino UNO Robot Kit: Complete with Electronics & Chassis - Tinkersphere
7 Awesome Robot Kits for Arduino - Maker Advisor
Amazon.com: KEYESTUDIO Mini Tank Robot V2 Smart Car Kit for Arduino, IR Infrared and App Remote Control (iOS and Android), Light and Ultrasonic Follow, 8X16 LED Panel, Ultrasonic Obstacle Avoidance : Electronics
Getting Started with the Arduino Robot | Arduino Documentation | Arduino Documentation