While D1 was playing on the floor this morning, everything suddenly clicked and she realized: if I roll over, I can get other places. All day long she's been rolling back to front and round again, trying to get new places and crowing with delight at her own cleverness.
The change is almost as dramatic as having her born (though significantly less effort on my part). She's got her own ideas and her own means of locomotion. She's a person.
She's a person who wallows on the floor a lot. True to Murphy, today was the day my vaccuum stopped sucking and the sponge disintegrated on my mop.