Frogs and Toads: God's Bug Snatchers — by Charlsy Ford. “God has made frogs and toads to help us by catching bugs and things that would harm us.” (This online book is viewed as a PDF file. You need to have Adobe Acrobat Reader to view it, which is available from get.adobe.com/reader/.)
How Can I See? — by John Clayton and illustrated by Gerry Miller. The design of the human eye is explained as a masterpiece of God's wisdom.
Why Is the Sky Blue? Why Are Trees Green? — by John Clayton and illustrated by Gerry Miller. The connection between blue skies and green trees is shown as one of great wisdom.