The other day, as we were driving to school, Jackson asked me, "Mommy, where does the sky end?" Profound, eh? And as I often am, I was dumbstruck because I did not know how to answer that question. How do you explain the whole of the Universe to a four year old? I asked him where he thought it ended. He said "maybe the ocean?" Good enough answer for me. A quite profound answer for a quite profound query from an even more profound boy.
I really must find a way to be better prepared for these types of questions in the future.