Knock knock. Who's there? Peas.

Peas who? Peas-fully waiting for you to open the door!

Knock knock. Who's there? Mango.

Mango who? Mango-nificent to meet you!

Knock knock. Who's there? Cows go.

Cows go who? No, cows go 'moo'.

Knock knock. Who's there? Brush

Brush who? Brush-ing aside the formalities, can I come in?