Where's it gone? See part of an animal on the page - and pull the slider to reveal the rest of it. Go on a quest in each of these books to find the main protagonist: Frog on the front cover, and then see if you can find them inside the book. In Hoppity Frog, meet a variety of pond life including Big Fish - pull the slider to see him launch out of the water! Each image is accompanied by easy-to-read text that teaches first words.