People ususally have relay racing in a sport game. Especially children love the relay racing project. They do not need to finish all the course themselves, they can finish to the final by cooperating with their mates. It makes them got more self-actualizations and be proud of their mates. In this game, you also need to do the same, after running your part of course, you need to pass the baton over your mate, and your mate will pass over the baton to the next one, too. Good luck with it! Have fun!