This is where climbing jungle gyms really shines. There's all sorts of places where kids can crawl underneath something. We crawl into the same areas; we just keep our hands and feet on the ceiling.

Basically, anything you can go under is a potentially interesting problem. There's everything from suspended tubes and bridges to more complex problems which require a longer sequence.

The section on technique concentrates mostly on jungle gym rooves, so be sure to check that out. Remember that long sequences can be extremely difficult without rests, so make sure you figure out how to stem between poles and look out for places to put a kneebar.

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