Liam the philosopher

We have a nice ritual of reading books together in either Liam or Laney's bed each night before bedtime.  The kids climb under the covers together and we read 3 books, one that each of them picks, and one that I pick.  As we got ready for bed 2 nights ago, Liam made it to his bed first and settled in to wait for Laney to finish brushing her teeth.  My little boy looked at me with a very serious look on his face and said, "Where did we come from?  Where did we all come from?"  He punctuated this sentence by throwing his hands up in frustration and furrowed his brows to bring home the point.  It took me a minute to decide what to say to him, since he isn't even 3 yet and really has a hard time understanding things that aren't concrete.  This is what I told him:  "God made us all.  He made you and then he put you in my tummy and then the doctor took you out."  Then he wanted to know how Laney, Patrick and I were made, and I had to explain to him that God made us all the same way, and that we were all babies once.  This is hard for him to believe and I know that he doesn't really understand that people are babies before they grow up.  He seemed to accept my answer though, and went happily to bed.  However, he began asking me today in the car where things he was seeing came from.  "Where is that tree from?  Where did that cat come from?  Where did that building come from?"  I told him that God makes everything and that really satisfied his curiosity.  Perhaps my son should pursue philosophy as an undergrad!