I was on a crowded 1.5 hour train where half of the passengers were standing. There were 3 kids ( not together, each with an adult) who were sitting in a seat, I would guess they were all roughly the same age, around 6 years old.
I thought that kids that age should either stand or sit on their parents lap (I know that's not the most comfortable but standing for an hour and a half isn't either).
What do you think? I just thought it was messed up that these kids were chilling in seats while you had a lot of people in their 50s/60s (not old, not visibly in discomfort) standing, but then I wondered whether it's harder for a child to stand at that age (I don't have kids).