I happened to stumble upon Great Adaptations - a children's book about evolution on kickstarter and I thought it might be the kind of thing my readers would enjoy. I'm looking forward to teaching my son about all of the science stuff that I love, and this is exactly the kind of thing that will help me make it fun. It of course also reminded me of The Magic of Reality, which I am also looking forward to reading to my son (once he's moved beyond board books).
In addition to letting you guys know about this super cool upcoming book, I would like to ask you guys if you know of other books along these same lines. Please add any other suggestions to the comments and I'll edit the post.
(Also, I want to let you guys know that I have my Exodus 13 post written, I just need to record the podcast for it, but I'm sick right now and my voice is ruined. Hopefully I will be able to get it done within the week)
Edit: Additional suggestions from the comments
Steve pointed us toward a slate article which suggests Bone by Bone, Why Don't Your Eyelashes Grow?: Curious Questions Kids Ask About the Human Body, and The Evolution of Calpurnia Tate
I'm looking forward to getting all of these books, please keep the suggestions coming :)