In the past two weeks at the SciFabLab we had the pleasure of hosting one of the activities of the Hands-On Research in Complex Systems School.
The school aims at providing early stage researchers with interactive experiences of hands-on research involving table-top experiments with computer data acquisition and modeling.   
In our lab we hosted the activities led by professor Evelyn Sander from George Mason University, USA: Professor Sander focusing on 3D-Printed Floating Objects.
The students designed a 2d shape, that was then transformed into a 3d object through Matlab and OpenSCAD,
then by adjusting the infill density in the slicer, they obtained a 3d printed object with a specific density. This was then placed in a water tank to identify the stable and unstable floating orientations and compare them to the predicted ones, testing them when possible also in the two-fluid interface between oil and water to see the different results.
We printed 26 different objects, and we were delighted to assist the students in their analysis.

More information on this activity can be found here
Proceedings of Symposia in Applied Mathematics: 3D Printing in Mathematics
https://esander1789.github.io/publication/ABCNS23