Today on our way home from Home Plus (where I randomly ran into Mijung!!), Anna turned to Sarah and said (we were still in the parking garage), "Sarah, it's dark, can you see me?" I think this was the first "real" conversation they have had.
Anna also serenaded Sarah in the car on the way home singing, "Sarah, Sarah, Sarah, Sarah...." to the tune of Twinkle, Twinkle, Little Star.