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
A baby’s kneecaps are made of cartilage. They turn to hard bone between ages 2-6.
Since cartilage is softer, that might make it easier for them to crawl on their knees, in addition to the point others have made about them being a lot lighter.
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