Hands-on Geology: Earth?s Layers - What's under your feet as you walk outside? There's more than just grass and dirt under there! Young readers will learn more about Earth's layers, from the rocky crust to the dense inner core, in this intriguing book. Color illustrations and photographs, as well as many hands-on activities and projects, provide additional context to ideas such as plate tectonics, early continents, and other topics related to the elementary science curriculum. Hands-On Geology: With Erosion! - The natural forces of our world are always at work on the planet we call home. Over millions of years, the forces of erosion have worked through wind, water, sand, and more to create the many features of Earth, from the worn-away banks of the smallest creek to the stunning landmark that is the Grand Canyon. This title will take readers on a journey through Earth's long history of erosion, using color illustrations and intriguing hands-on projects to show them just how interesting this geologic force really is.