I had the opportunity to do that twice (well, four times, roundtrip!) to Hawaii. The company was paying for it thank goodness. I recall when the 747 first came out my dad brought me on a Rotary Club outing to the airport where they gave a tour of the new plane. I was ten, and even though it was the first plane I had ever been in, it sure made an impression.
I remember my first flight to Tokyo on a 747 (I think from Chicago) with a stop in Anchorage. It was a Pan Am plane and I think they were ferrying it to Tokyo because there were maybe 10 paying passengers on the entire plane! That was so weird.
Here's the Wiki pic of the inside of the assembly building: