I used to believe that french fries were made of bread rather than potatoes. I hated all kinds of potatoes growing up and would actually complain about steak fries tasting 'too much like potatoes.' I didn't figure it out until 4th grade when my babysitter told me her brother had made fries out of mashed up bread and how gross that seemed...to which I said "well what are they made of?"...
A childhood belief about general

others believed things like this
- I used to believe that french fries were filled with mashed potatoes.... wonder how they got in there?— Nancy
- I used to believe that french fries were made of bread.— tendersoul
- I thought rice was just another way to prepare a potato, like mashed or fries.— Me
- I used to think clouds were mashed potatoes in the sky.— Will
- I thought french fries were really invented in France (they are Belgian for those who don't know)— Quarm
- When I was little, I thought that big puffy clouds in the sky were actually mashed potatoes.Anon