Oh, a couple of things I just thought of... If he is interested, pin-trading might be a wonderful thing for him.

Kids can laser-focus on those CM lanyards from 300 yards away

Plus, the Resorts all have pin trading boards, and Disney Springs has one as well.
If you all decide to ride the boats to/from Disney Springs, you may want to show him pictures of the Sassagoula fleet, and let him know that the boat is open-air, and the boats always honk their horns at one another! Lots of people love to ride the boats, and we always wave at the other families as they float by
Oh - and just so he is prepared - you might also let him know about how mobility device users will load the buses *first* (after everyone has gotten off at that stop) and then they get off the bus *last*, so that he knows that he has to wait for other Guests who have mobility devices to get on (or off) the bus. He may be so interested in the process (the bus "kneels", then it beeps loudly, and barfs out a ramp that the Guest then uses to drive into/out of the bus) that he doesn't even think about the delay.

If he rides the monorail, or any of the boats, he might get to see the portable ramps put down that people can use to drive on and off the boat as well.
And ask every Transportation CM if they have any trading cards...
