The Wide-Mouthed Frog has always been a favorite of mine. It's a hard cover copy. There is one word to describe it: Quality. The animals in the story really pop-up in 3D mode. And don't forget to use your silly voices for these delightful creatures. The children really get into it. Especially at the ending=)
And why not add the "Five Green and Speckled Frogs" song to go with it? I made these little guys a while back. Took me a while to get their fingers right. I would say it's more of the back-side view of the frogs. I added some glittered spots on it's back and there it is, some speckled-ness.