Knock, knock.
"Who's there?"
Not your dad.
Knock, knock.
Who's there?
Not Sally.
Why did Sally fall off the swing? Because she had no arms.
Knock, knock. "Who's there?" Not Sally.
Knock, knock!
Who's there?
Figs.
Figs who?
Fix the door, it's broken!
Knock knock. Who's there? Well, I will tell you who's not there: my dad.
Knock, knock.
Who's there?
Nacho.
Nacho who?
Nacho Cheese!
Knock knock.
Who's there?
Donut.
Knock, knock. Who’s there? Walnut. Walnut who? I walnut tell you. It’s a secret.