I'm looking for books on sharing and not hitting, for both girls (almost 2 and 3.5) but simple enough that my youngest can understand a little bit too. Hoping to pick up at the library, but it's not a huge library so open to a few suggestions so that I have options!

The girls like to smack each other on the head if the other isn't sharing or if one of them takes something away.

Do you use books for certain behaviors? Which ones?