Tumbller is a newly designed Self-blancing robotic car kit which has multiple functions and offers you a great hands-on experience. It's also a DIY kit which helps kids with fostering creativity and inspires imagination. Tumbller is easy to assemble and suitable for kids to have some hands-on experiences and learn basic programming knowledge. Professional robotic hobbyists can also enjoy it by customizing and adding more functions onto this kit. Arduino-Compatible: You can modify the default codes and upload your own program using Arduino IDE and work with the reserved pins to add more sensors. [Keep Balance] Automatically open the balance algorithm to keep the balance at all times [Obstacle-Avoidance] Tumbller will avoid obstacles ahead of it automatically with the ultrasonic sensors on the platform by sending waves and calculating the distance. Keep your car away from collision and enjoy the fun. [Auto-follow] If there is an obstacle in front, Tumbller will move forward or backward with the obstacle. If there is an obstacle on the left or right side, Tumbller will turn left or right with obstacle.