I also want add that OT has been amazing for our 6yr old. When there are tough days at school, the techniques that our OT does and has taught me have been so helpful to physically remove some of that stress. Giving him "heavy work", swinging, crashing, and deep pressure are now tools he requests to decompress from his stress. I expect you and your child are going to really appreciate what your OT brings in to your life.
Have you read The Out of Sync Child or The Out of Sync Child has Fun? Those books should be immensely helpful for your son's sensory issues. We love the activities in the Fun book! Even better for 3yrs old.
