O Scale Plasticville USA Dairy Barn Building Kit from Bachmann. Since 1947, hobbyists and collectors have made Plasticville® U.S.A. products their structures of choice. Throughout its history, the Plasticville® line has added many buildings and accessories that offer a fun challenge to collectors (you can even join the Plasticville Collectors Association!). Many items are still produced from their original molds. For hobbyists, Plasticville® pieces add character and dimension to layouts in HO, O, and N scale.