When I was young my parents were very keen on 70's and 80's rock and "Dire Straits" were one of their favourites. They would listen to "Money for Nothing" which has a lyric "get your money for nothing, and your chicks for free".
Now, I misheard that line and on a family day out in the car to said song, I came out with; "Daddy, if I grow up to be a rock star, will I get free chips?"
A childhood belief about misheard lyrics

others believed things like this
- 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
- i thought an ATM machine was something which gave free money!!— Armani
- When I was little, I believed that banks were places where anyone could go in and take some money for free. Anon
- I used to think that ATM machines just gave out free money when you needed it. Ahhh if only...Anon