Line tracking is probably the most widely used navigation system for robots especially in student level robot competitions. This robot though will most likely shock all those students with its sheer speed.
Check out this hyper fast line following robot and see if you and your friends can build a robot to match its speed.
Line tracking requires a contrasting line on the floor and therefore is not the ideal method for general robot navigation but it’s a good start to get to know the basics of robot navigation and these basics can be applied to more complex technologies. Happy coding.