Combine fun and exercise with a homemade obstacle course in the backyard.
Lay down a rope on the ground and have the kids 'tightrope walk' across.
draw a hopscotch (or lay out sticks) and add that the course.
Have them crawl under a low table or a tarp.
Jump over a small obstacle
If you have old moving boxes, make a tunnel.
Weave between trees or chairs.
There are heaps of obstacles that you can make with household items or use what nature provided in your yard!