About This Lesson
The playground at your local park probably has a conveniently spongy surface perfect for cushioning young bones upon the inevitable tumble from the jungle gym. But back in the days of monkey bars and concrete slabs, playgrounds were notorious hotbeds of bone fractures. One consolation of such a painful mishap was a cool cast signed by everyone in your class. Aside from that, a good thing about broken bones is that they start to fix themselves almost immediately. How do they do it?
