I've been reading your accounts of foster momhood with interest and respect, DB, a big job you've got there and bless you for doing it.
The inscrutable 4-year-old brain:
I'm making dinner and sad girl comes up to me and asks, "Who threw this away??" It is a note (some letters that don't form a word that I recognize) from her best friend, who was here today for a playdate. We had all cleaned up together -- sozlet, bf, bf's mom, bf's little brother, me -- and I said "I don't know, maybe [bf's mom] did. But now you have it, so no problem." (It wasn't particularly scrunched or anything.) She hugged it tenderly and looked up at me with huge moist eyes.
So then after dinner, as I'm cleaning up, I take the note from where it had been put on the counter and said, "Why don't you put this someplace special." She says, "Like where?" I said I dunno, wherever you want, up to you. After some deliberation she decides, "The garbage can."

I sputter about but but but what about when she was so sad...?? She shrugged. (Just asked her what happened at that point 'cause I'd forgotten how it went exactly, she confirmed that she wanted to throw it away, I asked why, and she said, "Well, it wasn't very good writing.")
Earlier, we were talking about how bad dreams wake her up. She says that in the morning, "If I'm dreaming a bad dream and wake up, I go back to sleep to see if it gets gooder or badder. If it gets badder and badder and badder then I wake up
immediately. If it gets gooder and gooder and gooder than I just -- go back to sleep."
Yesterday, upon my return from a big interview: "So, did you win?"