Me: so what do you want to learn about today?
Zi: about the P.
Me: pancreas?
Zi: no the P.
Me: phalanges?
Zi: no. The one with the P.
…
Me: OH! The Pee! The bladder?
Zi: not the gallbladder! The one that holds your pee!
Me: that’s your bladder.
….
Me: so pop quiz. What’s another name for your pee?
Zi: You’re-out.
Me: noooooo. Urine (you’re in)!