|||It's Okay to be Different 
by Todd Parr 
Illustrations and brief text describe all kinds of differences that are "okay," such as "It's okay to be a different color," "It's ok to need some help," and "It's okay to be adopted."
Find in Picture Books (ages 4-8)
|||Extraordinary Friends 
by Fred Rogers 
Focuses on people who are different, who might use wheelchairs or special computers, who are more like you than you might think, and suggests ways to interact with them.
Find in Children's NonFiction: 362.4 R631e (ages 4-9)