Raise your hand if you've ever fallen off the monkey bars and hurt more than your pride.

It's practically a childhood rite of passage. You climb, you swing, you push the limit, you miss, you cry. Maybe you dusted yourself off and limped back onto the playground. Or maybe you needed a trip to the emergency room to have a bone reset. (But if you were lucky, the cast came off in time to still enjoy some late-summer swimming).

Monkey bars, jungle gyms and playgrounds are synonymous with childhood pla…