Knock, knock. Who's there? Bertha. Bertha who? Bertha believe I forgot my keys again!

Knock, knock. Who's there? Alpaca. Alpaca who? Alpaca the suitcase, you pack a toothbrush!

Knock, knock. Who's there? Alex. Alex who? All ex out of questions, let me in!

Knock, knock. Who's there? Ivan. Ivan who? Ivan to eat some breakfast!

Knock, knock. Who's there? Al. Al who? Al give you a clue, it's me!

Knock, knock. Who's there? Salvador. Salvador who? Salvador-able pun at the door!

Knock, knock. Who's there? Norma Lee. Norma Lee who? Normally, I wouldn't bother you, but open up!

Knock, knock. Who's there? Stopwatch. Stopwatch who? Stopwatch you're doing and answer the door!

Knock, knock. Who's there? Doug. Doug who? Doug the hole, and let's get out of here!

Knock, knock. Who's there? Arnold. Arnold who? Arnold around, the corner is the doorbell!

Knock, knock. Who's there? Sandwich. Sandwich who? Sandwich you're welcome!

Knock, knock. Who's there? Who. Who who? Is there an owl in the house?

Knock, knock. Who's there? Snow. Snow who? Snowbody home!

Knock, knock. Who's there? Honeydew. Honeydew who? Honeydew who? Kick me!

Knock, knock. Who's there? Boo. Boo who? Are you scared of jokes?

Knock, knock. Who's there? Cows. Cows who? Cows say moo, not who!

Knock, knock. Who's there? Isabel. Isabel who? Isabel working, please open the door!

Knock, knock. Who's there? Lettuce. Lettuce who? Lettuce have some fun with jokes!

Knock, knock. Who's there? Dewey. Dewey who? Dewey have to keep knocking for you to open the door?

Knock, knock. Who's there? Boo. Boo who? Are you crying over a joke?

Knock, knock. Who's there? Olive. Olive who? Olive you and wish you would open the door!