Plastics are fantastic, but they are harming our environment. We have both the technology to make bio plastics and composites. The purpose of this experiment was to combine these two ideas and make strong biodegradable composite bio plastics. Secondly, the strength of the composite bio plastics was compared to their non-composite counter-part. The matrix of my composite bio plastics was made using cornstarch and a 1% glycerol solution, to which organic fibers (bamboo, corn stalk, paper, silk) were added. The composite bio plastics made by adding different organic fibers were not stronger than the non-composites.