How do you make biodegradable plastic?
You'll need 1 tablespoon of cornstarch, 1 tablespoon of water,
and a couple drops of cooking oil. Just mix everything up and
microwave it for about 20-30 seconds on high. Then take it out, let
it cool for about a minutes, and kneed the plastic with your hands.
You'll be able to mold it into a shape, and after 20 hours or so,
it should be hard.
It will decompose and disappear if you bury it in your yard ;)