In about 1997 on my first ever flight, a KLM Fokker 100 From EGNT-EHAM, my Dad asked the Airhostess if the Pilot would let us on the Flight Deck, so she said yes, and then forgot about me, so they let me in when we landed at EHAM;)
Then I got a lecture about the importance of Maths to be a pilot.
But, seen as my Dad and I were travelling back the same day, they leet me spend 15 mins on the flight deck on the inbound leg to EGNT...One of my best experiences of my life so far, and something I will never forget!!
Tough that they dont let you so much anymore, they wouldnt let me on the EasyJet and Ryanair FD's because they needed a fast turn around, and I forgot to ask the 757 Crew about it;)