something to share

joking with my daughter Arwen
Arwen, Knock, knock
Me, who's there
Arwen, Knock, knock
Me, who's there
Arwen, Knock, knock
Me, who's there (at this point I'm playing along)
Arwen, Knock, knock
Me, Who's there
Arwen, knock, knock
Me, who's there
Arwen, nobody silly, but the engine is knocking badly.