Earth Smart, now in ebook format. Follow the story of two children journeying around a town, learning about the environment and how to care for it. Find out how we can all make our world a cleaner, healthier place to live. DK Readers are part of a four-level highly pictorial reading scheme, which uses lively illustrations and engaging stories to encourage reading. Level 2 have long sentences, increased vocabulary, information boxes and a simple index - read them together with children who are beginning to read alone and with early or reluctant readers.