Polar Bear Horizon book app is an informative story with beautifully detailed illustrations. This interactive book includes a glossary, a polar bear fact section, professional narration, background audio and enlarged artwork for each scene. To promote reading in young children, individual words are highlighted as the story is read and words zoom up when pictures are touched. By combining the original text and artwork with features that educate, entertain and promote reading, this book appeals to readers of all ages. Other iPad book apps in the Smithsonian Collection include : It’s Tyrannosaurus Rex, Penguin’s Family, Triceratops Gets Lost and Wooly Mammoth in Trouble.