could do bug obstacle course 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.
32 Of The Best DIY Backyard Games You Will Ever Play -- DIY backyard obstacle course! I love the pool noodle and hoola hoop ideas.
Playing and Learning Begins at Home: Backyard Obstacle Course Added: Could be a lovely imaginative play 'agility course' for tots in the dog portion of Pet themed unit.
A fun DIY backyard obstacle course kids can make themselves (awesome for playdates and parties!) plus an easy DIY slip 'n slide.