Okay, so I looked at some of your past posts, and I see that Raymond is a 2.5 year old autistic little boy.
We have a little guy, a high-functioning autistic, who's now 6.5, and he's never had many problems flying, but here's a few suggestions for you.
During the planes decent, Raymond's ears will be greatly affected by the pressure change (OUCH!) Try getting him to swallow by giving him sips of water/juice/milk or whatever he likes, as it helps to relieve the pressure in his ears. Earplugs may help as well, but getting earplugs into a 2.5 year old, and keeping them in, could be a challenge. If he's still on a bottle, during the planes decent is the perfect time to give it to him.
Now, as far as keeping him occupied and happy during the flight, I'd bring items he likes from home. Does he like to spin the wheels on toy cars over and over? If so, bring some toy cars, or even better, bring a small abacus (he'll love it if he likes to spin wheels!).
He may also like to play with those little pipe cleaners that you can get by the hundreds at craft stores. They're soft and fuzzy and bend in every which way, so you and he could make all sorts of fun shapes and figures.
What could be a lifesaver for you though is a portable DVD player and some of his favorite programs/shows/movies/characters on DVD, so he can focus on that during the flight. If he doesn't like earphones, I wouldn't worry about it. We just came back from DL, and our DS watched movies on his DVD player without earphones, and because of the noise created by the jet's engines, no one around us could hear our son's DVD's. We asked around just to make sure that his DVD's weren't disturbing anyone, and everyone said they couldn't even hear it - YEAH!
Hope you have an excellent trip!
