My parents used to be thoroughly amused by my somewhat postmodern rendition of popular nursery rhyme "Baa Baa Black Sheep" when I was 3. It went a little something like this...
"Baa baa sheep,
A - wool,
Essir, essir,
Full.
A master,
A dame,
Lane."
Teeny Lynz bows, cue rapturous applause.
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that when sheep had their wool sheered off, they became lambds again.— Janet
- I used to believe that when sheep die, god takes their wool and makes it into clouds— Oded
- steel wool comes from steel sheep— tg
- I use to think sheep shrank when it rained.Anon
- sheep were wooly pigs— CJ
- I used to believe that humans were a subspecies of sheep.Anon