Invisible Highway is an experiment in controlling physical things in the real world by drawing in Augmented Reality. Simply make a pathway along the floor on your phone and the robot car will follow that path on the actual floor in your room. A custom highway with scenery is generated along the path to make the robots a little more scenic on your phone screen.
See the full story here: https://boingboing.net/2017/08/30/augmented-reality-project-adds.html