If you love plasticity and would like to play with CAD visually, there was a time where this app was working and free. Well you can still install it and use it on windows.

123 Design is a visual CAD software, from here you can export to meshmixer and then to prusaslicer and slice 3d print your pieces. Basically is the previous locally run Tinkercad

http://labs-download.autodesk.com/us/labs/trials/worldwide/123D_Design_R2.2_WIN64_2.2.14.exe