mine travels great too

he doesn't really need anything to occupy doesn't have a dvd player etc but wanted to offer some ideas for food

I got him a tupperware lunch pack thing a while back anyway he has his water bottles, and in the nack pack (as he calls it) we have lots of goodies, things he doesn't get on a everyday basis, little packs of lollies, apricots, sultanas, popcorn, bickies etc, all in individual packs... he loves it and uses it whenever we are in the car