Preheat your oven to 325 degrees Fahrenheit.
Draw your design with colored pencils on the rougher side of the shrink film.
Lay your shrink plastic flat on a parchment paper lined cookie sheet.
Bake at 325 degrees F for 1 to 3 minutes.
You will see the plastic curl and twist as it heats up.
Wait 30 seconds after the last shrink plastic is lying flat.
Remove the cookie sheet from the oven.
Let the plastic fully cool.
Once plastic is cool, you can add a protective clear coat.
Let dry.
Add jump rings, keychains or tassles to your DIY keychain.