Creative games for children?

I am an istant instructor at my martial arts school. I help teach children ages 6-8. We have the usual games that we play with the children to help them develop the basic skills. I like to be creative and introduce new games from time to time(of course the head instructor would need to approve them first). Does anyone know some fun and exciting yet safe games that would help children learn their basics? Any game is fine. It doesn't need to be specifically tailored to martial arts. However, a game that requires physical fitness, coordination, etc. is ideal. 10 points best answer!