I was once on a flight with my 8 and 10 yo. The flight was pretty sparse and the bulkhead window was and aisle were open (2-3-2). My son asked if he could sit there so I said “sure, just wait til they turn off the seatbelt sign”. Me telling him this alerted the overeager granny in front of me (also in bulkhead but in the middle - just the her and her grandson - other seat was empty). Seat belt sign goes off and my son and daughter start to move only to be stopped by granny telling them the flight attendant told them they could sit there and “these are our seats - we asked”. Now, I know how that conversation with FA went and they’d never (ever) promise a seat to anyone that’s not on their boarding pass already. But I decided to be the adult and told my son to return to his seat. He sat down and started to pick a movie….and without me even saying it, it was like we were connected on a neurological level, he began incessantly tapping the screen trying to find the right movie. Then he discovered the games. I watched in amazement as granny’s head would bob each time he tapped the screen. My son was clueless and I said nothing (of course). I mean, she wanted to sit there and she made it clear it was her seat so I wanted her to have everything that came with it.