I had an experience when i was 8years old(1989), SYD-NAN(Fiji), i think the old man told the hostess that i liked aeroplanes, and I got to visit the cockpit
I had the same experience probably at the same age on a night flight somewhere above Europe. I don't think I will ever forget the stunning look of that fully illuminated cockpit with what I assumed to be one million buttons and screens scattered all over the place. And I still remember what the captain told me about flying