A bright, lively introduction to our world with simple text, amazing photographs and detailed illustrations.Provides simple explanations to questions such as “Why is night dark?” “How do earthquakes happen?” and “What is under the sea?”Includes free downloadable pictures and internet links to carefully selected fun websites.. A Children’s Bookshelf Selection: Each month our editor’s pick the best books for children and young adults by age to be a part of the children’s bookshelf. These are editorial recommendations made by our team of experts. Our monthly reading list includes a mix of bestsellers and top new releases and evergreen books that will help enhance a child’s reading life.