What's that animal with tiny round ears and a big nose peeking out of the river? It's a hippopotamus! Early readers will learn all about these huge, mysterious mammals in this Level 1 reader from National Geographic Kids. From close-up photos of their gigantic teeth and adorable babies to fun facts about their ability to swim and the pink slime on their skin, this book offers young animal lovers tons of exciting information about hippos, all while improving their reading comprehension skills and vocabulary. National Geographic Readers feature engaging text carefully vetted by expert educators and accompanied by magnificent National Geographic photography. Level 1 books are written for new readers and include a hands-on activity to reinforce the content of the book.