Steven and Connie walk with prehistory

Imagine you could travel back in time. To a time long before man. Back across millions of millions of years through earths history. In this story, Steven and Connie find a special stone that transports them through earths story, and meet the creatures that inhabited it. From the first invertebrates, to the arthropods, to the dinosaurs, and to the mammals. Steven and Connie will have to struggle with the forces of prehistoric nature as they walk with demo starts, dinosaurs, and beasts