Joanna Cole & Bruce Degen Fasten your seatbelts and join Ms. Frizzle's class for another exciting adventure aboard the magic school bus. Your destination is the interior of the earth where you will get a hands-on education about the earth's crust, soil, rocks, rock layers, fossils, stalagmites, stalactites, and much more. Full of colorful illustrations and interesting dialog about the composition of the earth. Part of the best-selling science series ever. Ages ten and up. 1987. 40 pages. 10" x 8.5". Soft cover.