I used to believe that the numbers on the signs above overpasses telling the clearance height were actually math problems for me to add up so that I would have something to do on long car trips.
A childhood belief about road signs

others believed things like this
- I used to think the height of your shadow is the height you would be when your older. LOL :)— Kaitlyn
- I used to believe that numbers had gender, that the odd numbers were boys and even numbers were girls. — Evelyn
- Having seen enough red octagonal STOP signs in my time, I used to look out for green circular GO signs.— Gary
- When I was at primary school I used to believe you could only marry someone who was the same height as you!— Lucy
- I used to believe that 7 times 12 was equal to 83 or 84, depending on the math problem.— Eric Swensen
- I used to believe that "critical acclaim" meant that they liked it, BUT had some major problems with it, too.— Beth