How lucky are you!!!!! Happy Birthday to your little one!!! You can always have a basket waiting for your son upon arrival, or go to a character breakfast or dinner, and let the CMs know it's his birthday for a special surprise. I have done this for my son (now 22) for the last 20 yrs, ask a CM how to make it special. My son told me, the surprises I did for him at Disney, still make him smile!! Congrats to him and enjoy your vacation!!!