In just five easy steps, you'll learn how to build a realistic model railroad layout with mountains, valleys, creeks and low-lying areas. The SubTerrain Lightweight Layout System makes it all possible without the need for power tools or complicated calculations. It's fast and there's no mess to clean up. These 101 pages with 43 illustrations and 160 photos give you all the basics plus the advanced techniques on using SubTerrain's high density foam components. It's fun and anyone can do it anywhere!