Jason: How did the first dog come?
Me: Dogs are related to wolves, just like cats are related to lions and tigers. So a long time ago there were wolves and people started bringing some of them in their houses to live. Little by little those dogs liked people and weren't wild anymore, and they became the earliest domestic dogs - dogs that live with people.
Jason: But how did the first wolf and wild dogs come?
Me: Good question...
Sydney: Why is God in our bellies?
Me: Why do you think God is in our bellies?
Sydney: Well, then what part of our body is God in?
Me: God is everywhere.
Sydney: Oh right, even in the air.