National Geographic Readers: Penguins!Paperback, 13 January 2009

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!

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Visit www.natgeoed.org/commoncore for more information.