I was invited to a birthday party once, and I thought that I had to pay for it. I asked, and after a 'no' from my mother, I was still anxious to keep the invite as proof that I had been invited so that I could give it in on entry.
A childhood belief about birthdays

others believed things like this
- Up until I was almost 11, I thought that a birthday suit was a special outfit you wore only on your birthdayAnon
- I used to think that a birthday suit was a special outfit you wear on your birthday— Bri
- I thought Maria Carey's 1998 ballad was 'I'd give my arms' instead of 'I'd give my all'.— Briony Maggs
- I used to believe that on your birthday, you didn't advance to your next age until you ate your birthday cake.— Casi
- My parents have the same birthday -- month, day, and year. I though all mom's and dad's had the same birthday.— Cait
- i used to believe that bras were bullet-proof vests for women.— emily