When I was about eight I used to think that if you touched bug juice (insect blood), you would turn into a bug. I didn't know what it looked like back then, so I was kinda paranoid about it and avoiding everything that even looked vaguely like it even if it was just spilled drink turned dark from fading into fabric on the furniture or something.
A childhood belief about creepy crawlies

others believed things like this
- That by drinking a daily dose of buttermilk one would clean the blood thereby avoiding ACNE— Richard in Durham
- My mom said she had eyes in the back of her head. I looked and looked, but never found them.Anon
- I used to think that apple juice was beer and I'd drink it all the time and pretend to be drunk.— Dee
- I used to think that blood was blue until it touched air.— paetrw
- I used to believe nude furniture was ,furniture with pictures of naked people on them.— Bethany Mote
- I thought that grape juice was called "great juice". Anon