Knock, knock. Who's there? Lettuce. Lettuce who? Lettuce in, it's starting to rain!

Knock, knock. Who's there? Boo. Boo who? Don't cry, it's just a joke!

Knock, knock. Who's there? Orange. Orange who? Orange you glad to see me?

Knock, knock. Who's there? Cow says. Cow says who? No silly, Cow says moooo!

Knock, knock. Who's there? Hawaii. Hawaii who? Hawaii you doing today?

Knock, knock. Who's there? Olive. Olive who? Olive you and I miss you!

Knock, knock. Who's there? Harry. Harry who? Harry up and answer the door!

Knock, knock. Who's there? Cash. Cash who? Bless you!