I don't know about yours but my kids always have heaps of questions so coming home from swimming in the car the conversation starts up out of the blue like this:
E: Does Jesus live inside us?
Me: It's the Holy Spirit which is part of God too.
E: Ahh, the Holy Spirit. Why is the Holy Spirit inside us?
Me: It helps us do what God wants us to do ... and to become what God wants us to be?
E: Does God want us to be a person?
E: and he wants us to have a name?
E: My names Ethan. ... How do we learn to talk?
Me: We learn to talk from our mummy and daddy and the people around us.
E: oh ...