When it dries it becomes solid stone.
by craftbits (shellie wilson)
What you need
Paper (can be kitchen tissue)
Mix ½ cup of milk with four tablespoons of vinegar in a bowl that can be placed in the microwave.
Place the bowl in the microwave on a high temperature for a minute.
After heating the mixture will be liquid and solid. Pour the mixture over a paper and let it drink the liquid that is in the mixture.
Wait about fifteen minutes to let the mixture hold together.
This combination can be considered made out of plastic.