They waddled into stardom in National Geographic's March of the Penguins film. These guys are now nature's ROCK STARS! If you're age 5, you're probably as tall as an Emperor. But why do they throw up so much? March this way, and find out all! This is a high-interest non-fiction book that combines the brilliance of National Geographic photographs of penguins with informative texts written to inspire, inform, and excite young readers.