Tori - Today is  my son's bithday!
Me (trying to act interested) - Oh, how old is he?
Tori - I dont know!  Isn't that funny?
Me - You don't know how old he is?  Well, what year was he born?
Tori - I don't know!  Isn't that funny?  I don't know how old any of my kids are!  Hee, hee, hee.  Isn't that funny?  Hee, hee, hee.