DIY American Ninja Warrior Backyard Obstacle Course - Five different elements. Build and re-build this obstacle course, and then it breaks down for storage. Storage ideas in the post.
Old Man Johnson, Inc. - obstacle course
American Ninja Warrior obstacle course for kids?
Make A Kids Obstacle Course | Obstacle course
DIY Garden Obstacles - I'm thinking drill holes in a top bar of pvc and attach water hose so kids have to jump over a spray of water.
32 Of The Best DIY Backyard Games You Will Ever Play
Obstacle Course More
Fun outdoor party ideas for boys, make an obstacle course. This one uses wooden stakes and yarn, simple and easy!
diy backyard obstacle course - Yahoo Search Results
such a simple outdoor activity - obstacle course from everyday things!