Brent A. Ford & Lucy McCullough Hazlehurst 
Well Will You Look at That? Mouth & Teeth 

Big mouth; small mouth; sharp teeth; all over the place teeth; a mouth and teeth come in a wide array of shapes and sizes and serve a variety of functions in the animal world (even the plant world takes part). This book features spectacular photographs and questions to prompt children to consider why the world exhibits such variation among animals.