When I was little, I thought that when you ate something, it re-formed in your stomach into what it looked like in the first place. Like, if you ate an apple, you would end up with a whole apple in your stomach.
A childhood belief about eating

others believed things like this
- My Mom used to tell me if I swallowed an apple seed I would grow an apple tree inside my stomach!— Marg
- When I was a kid, I used to bellieve that when I eat an apple pip an apple tree would grow up in my stomach!Anon
- I thought the big apple was literally a giant apple in New York Anon
- I used to believe that an Adams apple was a piece of apple that was stuck in someone's throat.— Ron Aaron
- I thought a stomach ache was a stomach egg— Catherine
- as a young child i thought poo was brown from eating chocolate and pee was yellow from drinking apple juice!Anon