Are you familiar with quiet books? They are basically activity books that are made of all soft quiet materials like felt. It's often used for special times, like church, when you need to keep children happy and quiet. Take a look at these quiet book ideas for kids.
Books for kids about disabilities. This book is about a little critter who discovers he is not so different after all, even if he is in a wheelchair. It shows how everyone needs a little bit of help with something sometimes.
Louder, Lili - Great book for teaching quieter children the importance of using their voice. A very effective tool to help shy students speak up. It also has a classic bossy friend. Great for Perspective-Taking and noticing how what we say, and what we do can change how people feel
I have a large copy of this from my childhoood. I was always fascinated with how the puppies went "pell mell" down the hill, and wondered why people didn't use those words in real life. :) I'm weird. I know.