I used to believe that ATM'S had little people inside them counting money
I used to believe that George W. Bush's middle name was Washington, and that he and the first president were somehow one and the same.
I thought the presidential race was an actual running race to the White House, and whichever candidate got there first was elected president.
Child me thought that Los Angeles was a mythical city like Atlantis or El Dorado. Because I misheard how it was named and thought it was called "Lost Angeles"...as in "the lost city of Angeles."
When I was a child I used to think money laundering was about putting money in a washing machine and that was illegal because with water the money spread some liquid with color and you can print bills with this ink
When I was a kid, I thought the money from the ATMs was free and that it was printed on the spot.
When I was a child I used to believe that at the cashier ATM there was a person giving money
I used to think Monserrat sounded like monster rat.
I used to think a yeoman meant Yemen and Oman.
I used to think everyone had to be born in the country that they were ethnically from or related to their accent.