Philosophy with a 4 year old

Liam has become very philosophical lately.  He has so many questions all day long.  I know this is pretty common for a 4 year old, but some of them are very difficult to answer.  Here are just a few:
-When will we see God face-to-face?
-Why did God make villians?
-Does God decide which babies will be bad?
-Will heaven be just like this world?
-When God comes will He do a magic show?
-If God is with me all of the time, why can't I see him?
-What is Belle (our dog that died) doing now?

And of course some lighthearted questions, such as...
-Can a giant pick up something heavier than a giant?