Recently I am addicted to my newfound hobby of making shrink plastic accessories like brooch, keychains, earrings and even a badge to be sticked onto my mobile phone cover. My cute earrings Well, what is shrink plastic? It is a form of plastic that shrinks when it is heated. I am using a heat gun to heat it up but will consider to buy a cheap toaster oven in near future. Trust me, it is a cool and addicting craft especially when watching the process of it curling up and magically thicken and flatten out by itself.