Styrene has been used for generations of modelers to build anything. One main use I have is building BUILDINGS to scale for Dioramas. I use the sheets as walls cutting out doors and windows. Then use balsa wood for the window and door frame. Place the Styrene wall flat on some plastic. Place the Balsa wood frames (glued together of course) for door and widows. If you need to, secure wood framing with tape. Then Mix-up some modeling plaster. Spread it on the Styrene do not fill in door or windows. Spread around openings. Once it is dry you now have a nice wall for a house front with wood framed windows and doors. You can also build bridges, ramps, roofs, side walks, anything really.