I used to believe that you would grow a little each year at your birthday, and when you turned 15 you grew a lot
A childhood belief about getting older

others believed things like this
- My parents have the same birthday -- month, day, and year. I though all mom's and dad's had the same birthday.— Cait
- 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
- My birthday was on a different day every year, assigned by my parentsAnon
- I used to think that your birthday changed every year, and that your parents just decided what day it was.— Daniel