I used to think that cashback meant that the supermarket gave you free money back. So if your shopping was less than £50 you could get your shopping free and get some extra money on top.
It was only a few years ago that I was told that the money actually comes out from your account.
A childhood belief about money

others believed things like this
- i thought an ATM machine was something which gave free money!!— Armani
- I used to think that ATM machines just gave out free money when you needed it. Ahhh if only...Anon
- I used to think that money from ATM machines were free :p— qwerty
- That everything was free. You paid for nothing, money was just to look nice.— Blasia M
- i used to believe that if you were broke that you could go to the bank and get money for free!— Karianne
- When I was little, I believed that banks were places where anyone could go in and take some money for free. Anon