When I was little, I used to wave at the airplanes flying overhead during the day when I was outside - I believed that the people up there could see me and were probably waving back. I even believed this for a few years after taking a flight (and not seeing any little kids waving at me).
At night time, the plane lights were so mysterious to me (because I couldn't see the plane, just the lights) - I thought they were UFOs. I believed aliens were real because I saw a UFO a few times every hour while I was trying to go to sleep!
A childhood belief about aeroplanes

others believed things like this
- I believed that traffic lights had police officers inside them, turning the lights on and off...— CrowHeart
- I used to believe Airplanes were things that made air plane- like took out scents, took out impurities, etc...— Emile
- For a very long time I believed that there were little men underground that changed the traffic lights!— Melissa
- when I was little, I was scared of taking the plane because I thought clods were solid !! — valentine a french student in eigth
- I used to believe that the sky had stop lights and road signs floating about for the airplanes.
— LoonaSM's - After watching a crazy TV show, I believed that aliens were real. I still have a little fear of them. — Niki005