I think Isaac has his first little girlfriend :) There is a girl named Rosie at daycare who is only 5 days younger than him. She goes the same 3 days per week, and they always seem to be playing together. When Isaac gets his diaper changed (and can't play with her), she cries.
They wave at each other when we're leaving. And today he even waved when I set him in the highchair next to her. 1 ft away, lol. So cute.