Is God in Heaven?

Tonight Joshy asked me if God was in heaven, to which I responded yes. He then wanted to know if that meant He wasn't at God's house any more which took the conversation towards the idea of being everywhere. So, we detour around to God not needing a physical body like we do, a concept Joshy digested and then came to terms with. "God doesn't need a body but we need a body so that we can go poo poo." Yes, Joshy, I suppose we do.