I used to believe a burglar was some kind of non-human creature, so I once filled up a bucket with water, sawdust, and some other ingredients, which the burglar would inevitably eat and die from if he broke into the house. (I must have imagined that burglars were kind of like rats, which would be drawn to an appropriate poison.)
A childhood belief about criminals

others believed things like this
- At the age of about 5, I thought that any man carrying a bag/sack over his shoulder was a burglar.— Police officer, Ola.
- I used to believe that fire trucks were filled with water. — Renee
- i used to think the water tower was filled with milk— jen
- On family road trips, my parents always told me that water towers were filled with chocolate.— Edith
- When I was a kid I used to believe that my perent's were aliens and I was the only human in the house.— Ali
- I used to believe that teletubies where a kind of aliensAnon