Case in point that prompted this... We just went to the park with 2/3 of the triplets from next door, and hung out for an hour and a half or so there, playing in the sand, having fun. Headed back and Char went ahead with the other kids and went into their grandparents' house next door.
So off she went. Remembering to close the door at the top of our back steps because the air is on. Remembering to admonish Millie for trying to go outside.
I watched out the kitchen window as she crossed the driveway, opened their gate, and slipped into their yard, remembering to latch the gate shut behind her, and then cross the patio to their back door.
When did she get old enough to do all that? What switch flipped to make her remember to shut the doors, close the gate, not let Millie out?
I feel like I've missed something, but like everything with your children, things just happen. There's never a definitive moment for any of their changes. It really just happens.
I just thought Ellie would stay a little littler a little longer.