I had a friend who told me that he used to think that the conveyor belt from which you collected your luggage at your destination was the same one that you put it on when you checked in. So presumably there must be an international network of conveyor belts either under the sea or up in the sky!
A childhood belief about aeroplanes

others believed things like this
- I used to think it was against international law, religious principles, etc. To be born on Christmas Day. :PAnon
- I used to believe that "carpooling" meant you were outside the car and pushing/pulling it to your destination.Anon
- I used to think that aeroplane carry people to a destination which located on top of the clouds — kaizen7
- I always thought that a little person lived inside each mailbox waiting to take my letter to its destination.— Anne
- I thought planes collected clouds to make cotton balls.— Eddie
- I used to believe that a funeral organist was the person who collected the body parts of the deadAnon