This is the big guy. A remarkable, thoughtful kid.
To give you an example, the other day, while we were eating dinner he asked, "How far away is Saturn?"
I said, "Oh, I don't remember exactly, but I think it's about seven hundred million miles." (Actually, it's closer to nine hundred million, but I digress.)
"That has eight zeroes!"
Sometimes, you just have to sit back and smile. And not get too teary.