Child's First Lost Tooth

I'm finding it really hard to grasp that Coop is old enough to lose his first tooth. That's something only big kids do! In typical child difference, he gets a loose tooth, works at it, and seeks help to get it out quickly within a couple weeks. In contrast with pokey older sister who dawdles at every task in life including tooth drama lasting months until it comes out unintentionally. He thinks he's such a big boy ;)