  The purpose of this short paper is to describe a project to manufacture a
regular octohedron on a 3D printer. We assume that the reader is familiar with
the basics of 3D printing. In the project, we use fundamental ideas to
calculate the vertices and faces of an octohedron. Then, we utilize the
OPENSCAD program to create a virtual 3D model and an STereoLithography (.stl)
file that can be used by a 3D printer.
