Frogs Undercover is a hardcover spiral bound book that allows children to 'leap into a frog's life.' There's a plastic mold of a poison-dart frog on the cover of the book. As the child turns the pages, he'll be able to see plastic molds of the muscular system and the internal anatomy of frogs. These molds fit into the mold of the poison-dart frog. There are also 3 removable organs and a probe tool. Each page has interesting facts about frogs. WARNING: Choking hazard--Small parts. Not for children under three years.