The kids' sense of humor is generally split as follows: Madge - word, pun, tricks; Coco - slapstick.
An example of Madge's trickery.
I ask her for a cookie. She goes to the cookie jar (with a brief stop at the table on the way), opens it and closes it, tells me to open my mouth, and inserts a piece of rubber cat-poo (which she got at a novelty store in SF).
At least it was fake.