I used to think that I would never stop growing, and that eventually my parents would have to take out the roof and build a higher one because I'd be coming out the top of the house.
When thinking on how my parents seemed to have stopped growing some time ago, I decided that they just hadn't tried hard enough.
A childhood belief about general

others believed things like this
- Ironically my parents were born on the same day; so growing up, I thought all parents had the same birthdays. Anon
- I used to think that growing pains meant that a tomato plant was growing in your stomach.— Annette
- I used to belive you couldn't stop growing until you were bigger than godzillaAnon
- I thought if 3 cards stopped at a 3-way stop sign then they had to stop forever until Christmas.Anon
- I used to think that your birthday changed every year, and that your parents just decided what day it was.— Daniel
- I used to believe that my clothes were shrinking not that I was growing.— Joann