Amazon.com: Robot Kit 2 Wheel Self Balancing Robot Car Kit, WiFi Smart Robot Car with 2 DOF HD Camera, Obstacle Avoidance, Follow Function, Ultrasonic Sensor, Android/iOS APP PC Remote Control Robot Toy :
DIY Self Balancing Robot - Electric DIY Lab
two wheeled self balancing robot with stepper motor. - Hackster.io
Self Balancing Robot Using Arduino : 4 Steps - Instructables