Does anyone have recommendations for books introducing evolution theory to young children, aged 4-10? Obviously, I am perfectly willing to read to them, and explain the pictures in the book. There are many books telling bible stories in an interesting way, but I hardly find any quality (i.e. interesting to children, story-like, getting a message across) books on evolution theory. Some have a boring style (probably written by scientists that try to simplify the story), others don't even get a little bit of the essence across, and certainly not in a lasting manner. Any suggestions anyone? 

I think it is really important to create a balance against the offerings of excellent bible stories for children (and other fairy tales), and plant a few additional seeds labeled "evolution theory" early on in a world seeded with so many religious references explaining the creation of life.