I thought Spongebob's parents were cookies (they looked a lot like it) and I wondered why two cookies could have a kid that was a Sponge.
A childhood belief about general

others believed things like this
- Croutons are called "Salad cookies"Anon
- I used to wonder why fortune cookies never predicted something bad like "you will fall off a cliff"— Izual
- I used to believe that when the sky was pink, late at the afternoon, the angels made cookies!— Bella
- When i was a kid, i thought that nematodes would eat our house like in one episode of SpongeBobAnon
- I thought Spongebob Squarepants was a piece of Swiss cheese.— Melanie
- I used to think that Spongebob took place on LAND.— Eeveelover8632