Hee hee hee hee! I love this!
We were just having this conversation in our house over the weekend!
One of our favourites is when my eleven year old was about two. We had to go somewhere and I said to her "Let's boog-a-loo, Chickie-poo" and she looked all offended and stated very emphatically "I NOT CHICKEN POO!!!"
We still call her Chicken Poo sometimes...
Once (kind of like Barb's story) my daughter was telling me about this really old person that she had seen. This person was REALLY old, apparently "even older than Grandma"

(grandma didn't appreciate it, but thought it was funny at the same time)
...eatballs... wait until they wonder where the balls came from. Mine once said, sadly, "poor little chicken, running around with no balls"
(I nearly fell off my chair...)
I've got lots of em.

Mine are always saying something funny. Except some of it is less appropriate than the chicken ball one, so I can't post. Lots of bodily functions too. I think they were supposed to be boys sometimes.