I used to think that on your birthday you'd suddenly grow taller. I couldn't grasp that you grew gradually.....
A childhood belief about getting older

others believed things like this
- i used to believe that if i walked in the rain i would grow taller.Anon
- i used to believe that you were suppossed to grow taller than your parents, and then when i didnt i was sad.— crysb83
- when I was younger , I used to soup made you grow taller — dark-titouan-du-55
- i thought that when it was your birthday you grow and then you didn't grow until a years time.— hello
- I used to think you only grew on your birthday.Anon
- I used to believe that people only grew, physically and in age, on their birthday. — Aretia