If I do say so myself, I have stumbled upon a stroke of genius here. If your children don't tell you jokes that last for at least 8 minutes, where you have to guess the punchline, well, then, just count yourself blessed and move right along to the next blog and read up on how sprinkling rose petals on your bed will make your bedroom smell nice. This here is down and dirty practical advice about how to end the never ending joke.
5 yr. old: Mommy, this is a joke. (That's always a helpful clue, by the way, because you never know when you might mistake a joke for a real inquiry.) What did one dinosaur say to the other?
Mom: (Readying herself to laugh hysterically no matter how lame the joke and have a sweet little bonding moment.) I don't know. What?
5 yr. old: Nooooooo, Mommy, you have to guess!!
Mom: Oh, OK, Let's see what did one dinosaur say to the other? Hmmmm.....Roar?
5 yr. old: No, guess again!
Mom: I'm going to eat you?
5 yr. old: Nope!
Mom: (Less enthusiastically) It sure is warm around here?
5 yr. old: Nuh-uh
Mom: OK, what?
5 yr. old: Mommyyyyyyyy! You have to guess!!
This goes on and on and on for a few more guesses until, and here comes the genius part, Mom says "Hey, look I just saw a squirrel in the clubhouse! I wonder if you could catch it?"
5 yr. old races outside.