I used to believe that ponies were actually baby horses
A childhood belief about general

others believed things like this
- I used to think that ponies were young horses. I was embarrasingly old when I discovered the truth.— Al's view of the world
- When I was little I thought cows married horses, cows were all female and horses were all male. — Sheila
- I used to believe that horseradish
was made from horses.— Dee - I used to believe cows were ugly horses— Marlene
- When I was ten, I used to believe that the horses didn't sleep.— Jared
- I used to believe, as a child, that horses were male cows.— Martin Taylor