One Green Frog - Board Book Author:Yvonne Hooker, Carlo A. Michelini (Illustrator) One of the first of the Poke and Look Books, One Green Frog has a big yellow hole on the cover that forms a frog's eye. Page two features two holes and two toucans, page three has three holes and three lazy jellyfish, and so on. Preschoolers will enjoy counting their animal friends.