As 3D printer costs come down, more hobbyists are getting into making objects with 3D printing technology. Online communities and businesses make 3D printing patterns (downloadable files) available for purchase. These allow you to start printing without designing and programming yourself. Find 3D model files at sites like Thinigiverse, MyMiniFactory, Printables, Cults3D, and others. Browse these and other sites for objects you’d like to make. Look for these four surprising things you can 3D print at home. Coffee CupsGo beyond the kitschy souvenirs in airport and campus stores: print your own c…