I'm going through this with my 8yo daughter. We have been overseas since she was about 4, so her main flight experiences have been long haul business class. I realised I was in trouble recently on a 6 hour economy flight, when she first asked where the lounge was after clearing immigration, and then was shocked when we turned right on boarding the plane!
I got the 3rd degree interrogation after we sat down as to exactly why we weren't up front!!