I know it seems daunting but it's probably going to be a lot of fun. i've done it twice on my own with two little kids, and built it up as a real adventure. just get really really excited by the whole airplane thing. we got a book about My First Journey on a plane or something, plus books of animals in australia etc. just take a few favourite books, and a few little toys. don't take loads because you'll have to carry them around, plus the airline will give you a goody bag for kids. plus there is telly with a kids channel and lots of favourites. plus lots of food and snacks. and at some point he will just conk out from the excitement, i promise you. the jet lag thing is just a big big load of patience, i'm afraid. just be understanding if he's not in the best mood, and lots of fresh air and running around, as pickle says. and really try and switch to local time immediately, even if it means staying awake for ages. and bear in mind that he might not want to do very much for a few days. i found unpacking my kids toys and having them around in the new place you're staying in was a big help as it was one thing they recognised. good luck!