3D printing projects
Visualizing 3D printing with mathematics
The book Visualizing 3D printing with mathematics by Henry Segerman describes a variety of ways of producing 3D printed objects to visualise mathematical concepts, typically geometrical.
There’s an associated website, 3dprintmath.com, with images of the objects.
Tactile Universe
Tactile Universe a public engagement project to open up astronomy and astrophysics to people with vision impairments.
Nasa
Nasa provides printable 3D models of a variety of things, such as the Apollo landing sites, satellites, and rockets.
Polypanels
Polypanels is a system of interlocking polygonal panels.