I’ve got the flexibility and energy to crawl around with kids, but I need knee pads when it’s hard wood or tile floors. I just feel the hard surface scrape against the bones of my knees/ankles. Kids don’t seem to notice a difference. What is different about their knees that allows them to enjoy any kind of floor?
In: Biology
[square cube law.](https://en.wikipedia.org/wiki/Square%E2%80%93cube_law)
basically there is a LOT more force on your knees then on kids knees.
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