Multiple sources. I had one of the little battery powered airplanes like in Chicago Randy's post. I was also responsible for the demise of an entire balsawood forest via my consumption of Sleek Streak balsa wood airplanes. In addition, I was a child of the 60's and had the opportunity on endless school day mornings to watch the test pattern (anyone remember those?) change to the National Anthem, complete with F-104's and other Century series aircraft as the TV networks turned on in the morning. There was also the space program front and center during my youth. Oh, and since both of my Grandfathers and my Dad worked at Lockheed, GA, I went to a ton of open houses and airshows as a kid. I'm pretty sure I sat in one of Howard Hughes' Jetstars at some point. If you watch the video of the first flight of the C-5, I'm a little 3 1/2 year old dot standing at the end of the runway.

And my dad raised me right. The first grown up movie I remember attending was "The Battle of Britain". My dad took me to see that twice when I was 5. Still a favorite. ;-)