9. Create An Obstacle Course
Make an obstacle course in your backyard that gives challenging feats such as, jumping over logs, swinging from a rope swing, climbing a tree to get a flag, and crawling through a tunnel.
The physical exertion will have them ready for bed, but the action will have them going day after day.
Use a timer to see how long it takes them to get through, and then have them try to beat their time next time you play.