I almost forgot this story.  When we were in West Virginia camping, John David and I were swimming when he said (out of the blue), "I'm brown."

Me, "What do you mean?"

Him, "My skin!  My skin is brown."

Me, "Oh."  (I didn't really know what to say).

Then he said, "You're pink Mom.  You're pink."

Kinda funny.

That was his first reference to skin color.  And he hasn't said anything about it since.