T.B.
Little cans of playdough are fabulous for plane rides. Silly putty works too. My 19 month old played with that for over an hour on our flight to NY. The other thing that was wonderful was the Story Reader. Lollipops are also good, since they take a long time to eat, just make sure you bring lots of wipes. We brought the safety ones, but I wasn't able to find them in sugar free. Good luck. I also agree with the car seat thing, accept that you can't put the tray down with the carseat and also they can kick the seat in front of them when they are in it.