Not sure where to start with 3D printing? You can find and use ready-made 3D Models from the following FREE repositories. But remember to check copyright (or Creative Commons) permission as Copyright laws apply to 3D models as well.
Create your own 3D model designs (in .STL or .OBJ format) using the following 3D modelling software. For beginners, we suggest starting with TinkerCAD, a free and web-based tool that allows you to import vector graphics and turn them into 3D models.