Once, Mother told me that when she was very little, she thought EVERYBODY had an airplane hangar in their backyards! The reason? Her father (my grandpa) was a crop-duster and had his own plane.
Grandpa still talks about his crop-dusting days with great fondness and it is amazing just hearing him tell stories: "I got so much chemicals in my system from back then that every mosquito dies whenever it lands on me!" His third wife, my step-grandmother, still has considerable trouble believing this oddity!
A childhood belief about aeroplanes

others believed things like this
- I used to think Kenny Rogers had 400 children and a crop in the field. Rather than 4 hungry children.Anon
- My Grandpa told me if I picked my nose I could accidentally pull out my eye. — Jan St. Louis
- My grandpa told me when I was little that if you swallow chewing gum your butt will be sticky— Lili
- My grandpa told me that edible part of the watermelon was blue until you cut them open. Anon
- my grandpa told me if you pick your nose too far then a snail will bite your finger off haAnon
- My friend's sister used to think the auto pilot on a plane was an inflatable man like the one in Airplane!— Richard Davies