Mothers with babies are allowed on first (along with the elderley, pregnant woman), so if you dont have assigned seats, at least you will get pick of the run being first on. Most airlines cater for children - colouring books, some snacks etc. But do take your own. My DD had a tantrum on the way home, layed on the floor and kicked and screamed (lovely !!), but we were right at the back of the plane....so not a whole lot of people were disturbed.