When I was about four, my grandmother joked that she was twenty-one. I believed her, despite the fact I knew my mother was in her thirties and you needed to be a certain age to have kids. I just thought it didn't make sense because I was bad at math.
A childhood belief about getting older

others believed things like this
- I thought it was impossible for anyone to lift more than their own body weight. Just seemed to make sense..— Xenomorph
- My great grandmother died when I was 9. I didn't go to the funeral because I thought she'd be a skeleton. — Angela
- I thought Jesus was made up to make kids behave.Anon
- 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 some insects had twenty lives.LOLAnon- I used to believe that twenty was the largest number in the universe.— Bernardo Fernandez