I used to think that in Israel, you could get a driver's license at 13. Why? Because Jewish kids have their bar/bat'mitzvah at 13/12 and are then considered Jewish adults. This belief lasted from when I was 7 and first learned about different rites of passage from The Puzzle Place and all the way up until I was 14.
A childhood belief about getting older

others believed things like this
- Since Germans speak German, I thought Jewish people spoke Jewish.— Lori
- I grew up Jewish. Until I was about 10, I believed that everyone who wasn't Jewish was Catholic.— Philm35
- I used to think that jewish men wore "kippots" or "yarmulkes" to cover their bald spots..— Charlotte
- I used to believe that school was a place kids go to get turned into adults.— Samantha
- I used to think that I was smarter than adults. Now I know kids are smarter than adults in many ways— Marshall M
- I used to believe when adults grew up only 4' 9" or lower are still classified as kids.— Jorge