Im travelling to Brazil with my son on my own, he is 17 months old and I can just imagine him wanting to run up and down the aisle the whole time. Hes at the stage now that if you say no he will want to do it even more and get very frustrated when he can't. Its a night flight, and once he's asleep im hopeful he'll stay asleep as he is normally a good sleeper. Any helpful advice and tips to a very worried mum!!!??