Most of our skills are developed on the ground. When you begin working on apparatuses such as swing sets and hand rails, check your environment before you work. Stress test them for strength. If the bars are bending under your weight, then don't use them. Also, early morning dew and left over rain moisture will prevent good traction. I've also found playground mulch dust prevents good traction on poles. Some playground paints seem to discourage traction in certain temperatures. Be careful, be safe. There's nothing more frustrating than sitting out, waiting for your body to heal because you attempted something before testing your surfaces.

Stretching

...increasing flexibility to improve performance
 

Bipedal Movement

...developing skills on two feet
 

Quadrupedal Movenent

...developing skills on all fours