Grand Valley includes all the SubTerrain, Terrain and Landscaping items you will need to build this huge 4x8-foot layout. Use Risers and Inclines to create hills, mountains and low-lying areas on your layout. Use Foam Sheets to make flat, elevated areas for towns and buildings. Cover with Plaster Cloth for a hard terrain covering. Then make and install rocks and add tunnel portals and culverts. Landscape with a wide variety of ground cover, trees, accent details and other scenery products for a great layout.