Don’t throw away those fast food salad containers, plastic muffin containers – or any other #6 Plastic (not #6 foam, #6 plastic)! You can use that plastic to make your own shrinky dinks!!

Simply decorate the plastic with permanent markers and cut them out, punching a hole in your design with a hole punch if desired. Then bake at 350* for 2-3 minutes on a covered thin cookie sheet (cover with foil or parchment). You can also just make a tray out of aluminum foil and bake them that way. It will take slightly less time.
.
Watch for them to curl up and then re-flatten and you’ll know they’re done! Your colors will be darker after baking and will shrink to about 1/3 the original size.
.
You can make keychains, jewelry, etc. The plastic is still malleable when it comes out of the oven (and is still warm), so you can even do rings and bracelets by forming strips around chapstick/lipstick containers, small cups, etc. I LOVE this project!