"Mommy. Mommy. Hey, Mommy. Listen."
Tucker stuck out his chin and cast his eyes to the left: the international sign for I'm listening for something that might be coming from over there.
"Do you hear it?"
"I don't hear it, buddy."
"See? I'm not sneezing anymore!"
Ah. Sure enough. Next time, I may need some more clues on the absence of what we're listening for.