Two Dutch designers, Olivier van Herpt and Joris van Tubergen, developed an open source extruder that can be used for printing with beeswax. Using this extruder anyone can create temporary disposable objects out of beeswax on their desktop 3D printers. Beeswax has a relatively low melting point range of 62 to 64 °C. Once it has been extruded in a desired shape, the beeswax hardens. The 3D printed beeswax products are completely natural, made with the help of bees, with no artificial color, no artificial scent.
It is more of an "art" project, but it could be used in some biology related or food safe 3d printing projects.
Source pages and photo source:
Check out how to 3d print with bees:
Or, if you want to get into beekeeping and get your own honey and beeswax: