As a kid I refused to get on a plane annoying my Mum and Dad. Eventually they asked me the problem. It was obvious to me - once the plane took off you got smaller - and I wanted to get bigger not smaller.
I didn't catch onto perspective until a few years later!
A childhood belief about aeroplanes

others believed things like this
- I used to believe that clothes got smaller if you didn't wear them very often.Anon
- When I was smaller I used to think that if I broke the Tv the characters would come out x]Anon
- I used to believe a pickle was a smaller version of the cucumber.Anon
- I used to believe that wearing a bra that was too small would make my boobs get smaller.— Aretia
- When I was a child I used to believe that the things in my room became smaller but it was me who was growingAnon
- I thought the big hand was for the hour and the smaller one was for the minutes until i was in third grade.— Time Challenged