I used to believe that magnetism could "rub off" on you, like dirt or a smell. Like, if you touched a magnet with your bare hands, you'd get magnetism on you. And then, if you put your fingers in your mouth without washing them, you could swallow the magnetism and it would close up your intestines.
To this day, I still feel uncomfortable touching magnets!
A childhood belief about physics

others believed things like this
- I used to think that when it rained,it meant God was washing his hands Anon
- my brother told me that if i ride my bike with my mouth open i will swallow my tounge. Anon
- I used to believe that when I farted, i could smell up all the stench before anyone else could smell it.— Tim
- Until the age of 10, I was terrified of peeing out my intestines.— darya
- i used to think that when you ate food it went into your heart not your intestinesAnon
- my parents used to tell me if you ate raw carrots,you would vomit your intestines.— gerald finkleton