You guessed it! A tooth!
It emerged seemingly overnight. It was due to make an appearance, so I'd been on the lookout. Still, I was surprised when a routine round of gnaw-Mommy's-finger gave me the unmistakable sensation of being bitten, not merely gummed! The new arrrival is, of course, on the bottom and in the center, and it's barely visible above the gum. But it's white and serrated, and I'm sure soon it will be both cute and useful! I'm also confident Rowan's tooth-filled smiles will continue to win hearts just as well as his smooth-gummed ones did.