Atticus has a girlfriend! His teachers say they're inseparable. And we found out about her because for the first time that I can recall, when we asked him about his day at school, he started talking about several kids at school, one of them being Ava. When he mentioned her he got all smiley and flirty. I didn't think much of it, but mentioned to one of his teachers the next day that he had talked about Ava and another kid. Then she went on about how cute they are together--always holding each other's hands when the group heads outside or from one room to another, nuzzling up to one another, etc.
(Sorry about the poor quality of the photos; they're scans of paper print-outs.)