Infant should be ok for the bassinet upto about 13/14months, go for the middle if you can get it. Take lots of toys, they may not play with them but well prepared is well armed when flying with kids. Take snacks, lots and lots of them just in case of delays and also to keep them sweet onboard. Lots of pottering up and down the cabin works well, get friendly with the crew and your life will be a lot easier. Lastly good luck and have a wonderful trip.