The Girl is getting control of her hands. They’re still jerky, and this is a cause of great frustration. “Get used to it,” I say. “Not being able to get your hands to do exactly as you wish is something that plagues us for our entire lives.”

But she has, I think, finally realized that those things sticking out from her shoulders are hers and under her control. So she’s reaching for things. She’s holding things. She’s flinging things, though somewhat accidentally.

And once a little almost-four-month-old gets that ability, where does everything go? Straight to the mouth.