SUBTERRAIN LIGHTWEIGHT LAYOUT SYSTEM

ANATOMICAL MODELS FOR SCIENTIFIC, INSTRUCTIONAL, AND EDUCATIONAL PURPOSES, NAMELY, A LIGHTWEIGHT MODEL RAILROADING LAYOUT SYSTEM USED FOR DESIGNING TOPOGRAPHY OF MODEL RAILROADS COMPRISED OF FOAM PRODUCTS, NAMELY, RISERS, INCLINES AND PROFILE BOARDS; MODELING TOOLS, NAMELY, MARKERS FOR USE WITH FOAM GOODS; ARCHITECTURAL MODELS, NAMELY, FOAM ROADBEDS; FINISHING AND COVERING MATERIALS FOR FOAM MODELS, NAMELY, ADHESIVES, PASTES AND PUTTIES FOR DO-IT-YOURSELF PURPOSES