The worms crawl in
The worms crawl out
The worms play pinochle on your snout
They eat your eyes
They eat your nose
They eat the jelly between your toes
Your stomach turns a ghastly green
The pus comes out like thick whipped cream
You slap it on a piece of bread
And that's what you eat when you're dead!
That song can gross out eight year olds, gets the thirteen year olds, too.