From site:
2,483 illustrated dictionary entries! Each word is used in a meaningful example sentence. Most entries have links to a related web site. Just click on an underlined word (or its accompanying picture), and you’ll link to a related page. The LITTLE EXPLORERS picture dictionary makes surfing the Internet very easy. A picture-dictionary format is used to link to hundreds of carefully-chosen child-friendly sites around the world. Since the pictures are links, even pre-readers can surf with a minimum of help and guidance from their favorite adult. Older kids can use Little Explorers as a school reference.