It’s never too early to learn about the beauty of America’s National Park System.

Start them young with this charming set of four board books. Each one focuses on a different aspect of the environment—water, land, animals, or plants—in 16 national parks from coast to coast, including the Great Smoky Mountains, Big Bend, and Glacier Bay. With eight vibrantly illustrated “pages” per book, there’s plenty for your budding explorer to take in (and grab onto, slobber on, etc.).