How did Earth form--and what would it be like to see it? What does it look like when a volcano erupts? The Museum Kids are endlessly fascinated at the natural science museum to learn about these and other facts. Then, they enter a magical elevator and travel into the past and around the world to find out more! Including science facts about the structure of Earth, ecosystems, and much more, this beautifully illustrated volume engages curious readers with the story of the Museum Kids and all the danger, adventure, and fun they encounter. A concluding quiz tests what everyone has learned together.