The facts in those books pull me in with the strength of a short story or novel, and they had the same effect when I was a child.
More and more books are being written to let kids make the most of their interest in nature. Go Explore Nature recently reviewed one such book. First Animal Encyclopedia gives facts about many different types of animals and provides suggestions for helping children learn about them firsthand.
Having an interest in learning about nature is great, but children also need to have access to the information they crave. This book looks like one of those they can't help but reach for if it's around.