I still remember when I was young, back in the mid-90's and flying on a LH 747, EWR-FRA, and when we were cruising over the atlantic, one of the FA's set it up so I could go into the cockpit. Brought me on up, into the cockpit, and even had me sit in the captain's chair while the first officer explained the controls to me. Very cool experience, looking out the front, even able to see other aircraft flying on the route. Its a shame that young people can't have that kind of an experience these days.