Knock, knock. Who’s there? A little old lady. A little old lady who? I didn’t know you could yodel!
What has keys but can't open locks? A piano.
What's the difference between a guitar and a fish? You can't tuna fish.
Knock knock. Who's there? Turnip. Turnip who? Turnip the volume, I can't hear you!
Knock knock. Who's there? Razor. Razor who? Razor hands, it's time to dance!