After our lass (no) spots a tiny slug climbing up the outside of the kitchen window:
Her: its probably off looking for its shell.
Me: <Baffled> what ya mean?
Her: For when it grows up and becomes a snail!!!!
Me: Slugs aren't snails you know.
Her: Of course they are, they find a shell when they get big enough!
I had to find a website about snails to prove it. Bless her!