What was a whacky theory or thought you had when you were a kid?

I used to try to think about infinity. what's outside it. what does it look like, how can there be no outside, how can it be infinity...

And... I used to think about that my mother said that if I ate the pips from apples then I'd have apple trees growing out of my ears... I ate and ate those pips.. and waited for the apple trees to grow...so I could pick my own apples... it never happened :(