Knock Knock Jokes 4 Knock Knock Who's there? Alda! Alda who? Alda time you knew who it was! Knock Knock Who's there? Aldo! Aldo who? Aldo anywhere with you! Knock Knock Who's there? Aida! Aida who? Aida lot of sweets and now I've got tummy ache! Knock Knock Who's there? Al! Al who? Al give you a kiss if you open this door! Knock Knock Who's there? Adelia! Adelia who? Adelia the cards and we'll play snap!