So I was outside to get the mail when I see a kid with a box on the sidewalk and yelling, "duck kittens for sale!" Curious I walk over to look at them, all I see are cute cuddly young kittens. Next day, I hear the same kid yelling, "Beaver kittens for sale"! Again, curious I walk over to look at them. "Aren't these the same kittens you were trying to sell yesterday." "Oh, yes", is the boy's reply. "Well yesterday you called them duck kittens and today you are calling them Beaver kittens. What gives?". The boy answers, "Today their eyes are open!"