There is a curious phenomenon when talking to kids: they can’t hear you if they have something to say.
Try as you might, you can repeat yourself over and over in a monotone, but the kids just can’t process it until you acknowledge them first.
Perhaps it is part of being a young kid when you think the whole world revolves around you. The brain is definitely immature and all the synapses aren’t firing in coordination yet.
But, mostly, I think it comes from the fact that the kid is thinking: doggone it, I got something to say!
I'm starting to feel the same way myself.