Knock-knock jokes

Maïa is into knock-knock jokes, but I don't think she's quite understood them. We taught her this one:

Maïa: Knock, knock.
me: Who's there?
Maïa: Banana.
me: Banana who?
Maïa: Knock, knock.
me: Who's there?
Maïa: Banana.
me: Banana who?
Maïa: Knock, knock.
me: Who's there?
Maïa: Banana.
me: Banana who?
Maïa: Knock, knock.
me: Who's there?
Maïa: Orange.
me: Orange who?
Maïa: Orange you glad I didn't say banana?

Then she made up this one:
Maïa: Knock, knock.
me: Who's there?
Maïa: Princess.
me: Princess who?
Maïa: Knock, knock.
me: Who's there?
Maïa: Princess.
me: Princess who?
Maïa: Knock, knock.
me: Who's there?
Maïa: Princess.
me: Princess who?
Maïa: Knock, knock.
me: Who's there?
Maïa: Prince.
me: Prince who?
Maïa: Prince you glad I didn't say princess?

I guess making up jokes takes time to learn...