There’s babies and there’s babies

Noah and Tyler (19 and 16 months old, respectively) stand in the kitchen, awaiting the first bite of the freshly-baked cookies, now cooled enough to eat.

I hold a piece out to each of them. Tyler lifts a hand to take it from me; Noah leans forward slightly, his mouth open, waiting for me to pop it in.

The difference?
.
.
.
Tyler is a second child.