I have taken my little one away since about 9 months old. They should fit in with you so dont be afraid to just go with the flow, it's easier than it may seem. We take a fully loaded ipad with games, films etc small gifts that can be unwrapped at intermittent periods (such as colouring/reading books, cars, cards, pencils) def take plenty of snacks and something they can suck chew when taking off and landing (or give a bottle) as that with help prevent the ears from blocking. Also if he has a blanket/comforter take that. Those neck cushions can also come in handy as a pillow, you can get inflatable ones now to save on space also. Good luck ;)