The CityBuilder O Gauge 1:48 Scale Roads & PAVEMENTS Cardboard Model Making Kit Model Railroad Accessories Made of CARDBOARD. Self construction model making kit. Needs to be constructed by buyer. Realistic design. Sturdy and durable. Perfect for O scale Model Railroad layouts, scenery and dioramas. Contains pre-printed, precision cut, high quality cardboard sheets with a photographic instruction manual to help construct this kit. Requires glue, craft knife, steel rule and other optional items to cut, build and complete. Do it yourself activity. Children may require parental guidance to complete this model.