Bioplastics from eggshells There are many resources online which talk about projects making bioplastic from egg shells. However none of these actually show or describe the procedure needed to make it. Does anyone know a site/paper which one could use to figure out how to do this for a science fair project?
Eggshell is 95% calcium carbonate. It seems more likely to be used as an additive in a composite plastic.  Testing composite plastics produced from adding ground eggshell to common plastics may make for an interesting science project.

References:

Dissertation on meat and bone meal derived plastics

Patricio Toroa et. al. Eggshell, a new bio-filler for polypropylene composites