Shrink plastic keychains are an easily customizable project that you can put on keys, backpacks, and other things for decor. There is an unlimited amount of possible designs that could be created, so have fun with it!

Supplies

- Shrinky Dink sheets (frosted)

- Permanent markers (POSCA markers work great)

- Jump rings (7mm)

- Split rings (24mm)

- Parchment paper

- Baking tray

Tools:

- Hole punch

- Scissors

- Needle-nose pliers

Step 1: Drawing Your Designs

To start, take a shrinky dink sheet and lay it on a flat surface with the frosted side up(the rougher side that seems sanded down). This is the side to draw on. Next, take any permanent marker and start drawing the designs you’d like, but keep them fairly spaced out for cutting in the next step. Remember that whatever you draw will shrink when baked, so draw it at a fairly large size. Additionally, leave some open space at the top of your drawings so they can be hole punched. Also, don’t go over with the same spot when drawing or coloring, as the plastic may not be as smooth when it finishes shrinking. Be sure to let your designs dry completely before any other steps.

Step 2: Cutting and Hole Punching the Drawings

After you are done drawing all your desired designs, it’s time to prepare them for baking. Take a pair of scissors and cut around the drawing, leaving some space between the actual drawing and paper. Remember to leave some space for a hole punch. When cutting, lines should be clean and round.

Step 3: Baking

Preheat your oven to 375℉, or to 190℃. Whilst waiting for it to become hot, find a baking tray to put your designs on. But first, place a piece of parchment paper over the tray. Then, place your cut out pieces on the paper, frosted side up. Make sure they are evenly spaced. Then, when the oven is ready, place the baking tray inside and bake for about 1-3 minutes. If you look, you’ll be able to see the pieces you laid down shrivel up, then flatten back down. Once they have all completely flattened, take them out of the oven. Quickly let them cool, and then you can take them off the tray.

Safety Concern: Materials will be HOT, so be careful when handling items in and out of the oven. Oven mitts strongly suggested.

Step 4: Creating the Keychains

Now, to make the keychain, have your jump rings, split rings, and needle-nose pliers ready. To make one keychain, grab a jump ring and use the pliers to pull apart where the ring encircles. Make sure that you pull the two sides apart enough so that it can go through your piece. Once you’ve done that, place the jump ring through your plastic piece and use the pliers once again to clasp the jump ring back together. Be sure it's securely closed. Then, take a split ring and attach your plastic by putting the jump ring into the split ring. You can additionally put several plastic pieces onto one split ring if you wish.

Step 5: Finish Any Other Designs

Here, using steps 1-4, I created a couple more keychains. Some actually had more than one piece on it. You can hang these on anything you desire, and if you would like to make more, just come back and reference this instructable.