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
Babies under about 2 legitimately don’t have knee caps. When babies are born they have way more bones than an adult does, and way more cartilage. Knees in particular are mostly cartilage and internal padding when they’re too little to walk. Knee caps don’t harden up till later
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