When I was in Primary school, I used to believe that Disney Land was in the sky and the rainbow was the entrance. When a rainbow appeared, it meant it was open and you would need to catch a plane to get there. I would imagine Mickey Mouse being out front waving to everyone as they got off the plane.
A childhood belief about weather

others believed things like this
- I thought that "slipping someone the Mickey" had something to do with Mickey Mouse— stymie
- "Somewhere over the rainbow
Weigh a pie."
Why did Dorothy weigh a pie somewhere over the rainbow?— John - That the white stuff coming out of aeroplanes meant that someone on the plane had just got married.Anon
- When I was little I wanted to go to Disneyland as soon as I could, before Mickey Mouse died.— Mary
- Someone I know IRL used to believe that Goofy (Mickey Mouse's friend) was a walrusAnon
- I used to believe that was a treasure in the end of the rainbow— Marcos Vinícius da Rocha Ava Nimbuvui