(well, I didn't hear it... but Sarah relayed this to me):
Penny: "Mama, when is Kailey going to start talking human? I don't speak baby."
I have had the same question, Penny!! But, she's getting there. This morning she repeated "purple" (aka "pu pu") and then told me I was wearing "bu-ew". But, we may be a bit off from clear "human" talk just yet!