What a tragic story....I'm so sorry
For what it's worth, here is my idea for this childs artwork.
How about framing it, and donating it to the school to hang in a common area so that every student can see that regardless of their life situations, everyone has something to give to the world. It can be a reminder that even when someone has a difficult existence, there is still something beautiful within to be cherished.
Maybe in a few months, there could be a dedication ceremony in which the family is invited to. Like I said, this is just my own thought and it may not even be appropriate.
Hugssssssss
J