This is THE famous first picture book that needs no introduction. If there's a baby around their first birthday in the house, this is a must-have book that nearly every family owns. With its simple storyline—greeting the moon that appears over the rooftop, making a sad face at the cloud that covers the moon, and imitating the moon sticking out its tongue—babies who are just starting to understand "hello" and enjoy peek-a-boo games can easily follow along. Thanks to this, it has remained a beloved first picture book for babies celebrating their first birthday for over 30 years. If you're a parent who's skeptical that such old-fashioned illustrations could really appeal to children, you might be surprised to see your baby—who can't even talk yet—following the moon's movements across the pages, reacting with delighted gasps and giggles! It's a book as wonderfully mysterious as a baby's hidden inner world.