Hi I am not a STEM educator, but I have a kiwi 3D printer in my school and I started this year a little activity with my students. We used Tinkercad to print some solids.
It was interesting for me as a middle school language teacher to integrate this activity with the 3D printer into my subject. We did a bit of geometry in German, then a quiz about geometry and our 3D printer. I created a team of expert students, who supported me when we shared our experience with the kindergarten and the primary school children. It was a simple but very exciting experience. Next year I want to continue the experience and to involve other colleagues and subjects in a cooperative and crosscurricular project.
Our work in eTwinning (in German)https://twinspace.etwinning.net/16289/pages/page/128900