Our school did an American Ninja Warrior type challenge which we built and designed for the school in two weeks. There were five obstacles: monkey bars, an a-frame wall, four balance beams, five step platforms, and a tunnel laced with rope. Our designs looked like this:

 

 

We spent about an hour and a half for about 5 days to get to this point:

The quintuple steps

 

Balance beams

 

Monkey bars

 

A-Frame wall

 

 

After a few finishing touches, ensuring safety, and some paint they ended up looking like this: