I don't know how many times in a day I hear this from my 4 yr. old. It's as if she's automatically programmed not to hear me the first time I say something. There's some filter in her brain that blocks mommy's voice. So every day it's "What mommy? I didn't hear you!" resulting in me having to say everything twice to my preschooler! Frustrating? YES Aggravating? YES Do I see the beginnings of a teenager who never listens to me? A resounding YES!!!