I've written a book for parents who want a naturalistic interpretation of the world and its origin for their children. It's called "The Turtle and the Universe." In the book I try to show how physics, chemistry, biology, geology, and astronomy are all really one thing, how they all tie together so coherently in our current understanding of the universe.
The book is all about asking the big questions, "Where did we come from, where are we going, what is the universe, anyway?" without resorting to supernatural explanations. You can find the book on Amazon if you're interested.
http://www.amazon.com/...phen-Whitt/dp/1591026261/ref=sr_1_1
I'd love comments on the book.
Thanks,
Stephen Whitt