7 Weird Things That Happen Before You're 7

Kids are weird. They eat mud, talk to bugs, and stick things up their noses... but the changes kids go through as they grown out of infancy and into childhood are even weirder!
Hosted by: Hank Green
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Sources:
Eye color:






Brain cells:


Head shrinks:




Body growth:
Shivering:


Larynx:



Language: