I found a trashed school bag. All that was salvageable was a school book, two other books and a library card.
Of course I couldn't leave this girls stuff out there (also I couldn't leave books out there). And thankfully there was a library card so I could go my local library and have them look her up and contact her. I left the bag with the librarian and fingers crossed they will find her and she'll be able to come get it.
I don't know if this was the work of thrives or bullies (I guess in this case they are the same thing) but you would be an idiot to think a little girl would have large amounts of cash or valuable thing in her school bag. Either way I felt bad for her. So I collected a little goodie bag for her.