Well the story goes on and on with cute pictures and little factoids built into kiddy style sentences:
"We have a layer of fat and a thick coat to fur to keep us warm."
"In the winter we sleep cuddled up to mommy. The daddy's sleep on alone."
I read this last one out loud and then comment "oh poor daddy's... sleeping on their own like that."
George (5) comes back with "Well, maybe they need their space. Sometimes daddy's need to have their own space."
I gave him one of those weird looks I save up for incredulous moments... when the sheer wonder of children gets a really good grip on me.