A fun new format including a time traveler's dial allows kids to explore the Earth's history. This interactive book format invites children to go through different time periods: explore the sea of the Paleozoic era on one spread, and visit herbivorous and carnivorous dinosaurs of the Mesozoic era on another. The cover mechanism enables them to dial into and learn about a specific period in history through colorful and inviting illustrations and facts. This entertaining reference tool is a great resource and addition to a home library.