Knock, Knock... Banana

Baby girl (age 3 1/2): Knock, Knock
Grandmother: Who's there?
B: Banana
G: Banana who?
B: Orange you gla... um... no no... um....

Me (prompting): Knock, knock?
B (brightening): Who's there??

Me: falls out of her chair laughing.

Okay, I didn't really fall out of my chair.