The Big Wide-Mouthed Frog is a great book to introduce your little ones to animals and what they eat. The story is about a big wide mouthed frog who goes around talking to other animals and finding out what they eat (none of the animals he talks to though needs cat supplies). Some examples of the animals are an ostrich, koala, and kangeroo. I love the illustrations in this book too. They are full page and are very colorful. They definitely caught my little ones attention.  This is a hit here and will be in your house too (especially for any frog fans out there!)