Sit right there and look around the room and see if you can spot something made of plastic. See, I told you so. The keys on your keyboard are made of plastic. The mouse you've got your hand resting on is made of plastic. These plastics can be either natural plastics which are made of materials such as wax or natural rubber, or they can be synthetic plastics which are made from polyethylene or nylon.
Most plastic is made of petroleum oil.
The type of plastic we're fixing to make is of the natural type. Continue adding spoonfuls of vinegar and stirring until it begins to gell. Now let the it cool. Next, wash the rubbery stuff with water to clean it off. You'll have little plastic 'curds'.