April is autism awareness month.  One in eighty-eighty children are affected by autism in America.  Here is a list of resources.   
Websites:

http://www.autism-society.org/ 
http://www.autismspeaks.org/
https://www.thegraycenter.org/
http://www.amctheatres.com/programs/sensory-friendly-films

Books:

The Out-of-Sync Child: Recognizing and Coping with Sensory Processing Disorder, Revised Edition
by Carol Kranowitz and Lucy Jane Miller

Your Life is Not a Label: A Guide to Living Fully with Autism and Asperger’s Syndrome byJerry Newport

My Friend with Autism: A Coloring Book for Peers and Siblings
by Beverly Bishop

The Autism Acceptance Book: Being a Friend to Someone With Autism
by Ellen Sabin