For example, take this statement:
"Everybody eat a.....OOOOPS."
This was said while feeding her toy animals a fake apple which she then accidentally dropped on the floor.
She laughed hysterically for about 5 minutes over this. She kept saying it over and over and laughing harder and harder each time.
Today it was the word, "Empty".
She likes to make jokes too. In one of her favorite books there's a forest scene with a moose, some bunnies, a raccoon and such. She'll point to the animals and with a sly smile say, "Monkey!" Then she giggles when I say, "Noooooooo. That's not a monkey. Silly Katie!" She does the same thing with the scene in the desert, on the beach and even in Antarctica.
One day she's going to pull on my pant leg, I'm going to turn around and look down at her and she's gonna hit me with, "So, a horse walks into a bar......"