My grandma grew up in Eastern Europe and she gave me some old money from her country from a time of hyperinflation where the values on the bills were in the hundreds-of-thousands, and she said that's how much a loaf of bread cost back then. I was super excited and thought I was rich because of how big the numbers on the bills were! I didn't understand why no one else didn't just hold onto their old money from that time and used it today to buy mansions. My dad had a hard time convincing me that money from that time can't be used anymore!
I used to think Asians who wore glasses were meant to be cross eyed, because of how they read and write backwards in languages like Hebrew, Arabic, Hindi, Urdu, etc!
I used to think all urban city life in England had to take place in London, and everywhere else was just beaches and countryside. Think of places like the Yorkshire Dales and the Peak District, for instance.
I used to think the American states were all different countries and didn't realize it was all one country together!
I used to think that Nevada was Nineveh
I used to think all Italians worked in pizza restaurants.
I was a little disappointed when I got my first piggy bank to discover it had a rubber stopper in the bottom where you could take the coins out. I had assumed the only way to open a piggy bank was to smash it open with a hammer like they always do in cartoons, which seemed so fun.
I also used to believe If you had a credit card the money is free
When I was in the school I used to believe that inside the automatics cashiers there were people working and they were the ones who delivered the money. Then I asked my father about this and he told me how atomatics cashiers worked.
I used to believe when I had 10 years that when I play soccer at the night. I would think all the players ignored the rules of the game and the referees allowed everything