Shrinky Dinks Midnight Jewelry is an excellent way to spend a day indoors! Color, bake and shrink with special black plastic Shrinky Dinks. Make fabulous charms, necklaces and earrings. Shrinky Dinks sheets are made of a special thin, flexible plastic which, when heated in an oven, shrink and harden without altering their color or shape. We precut all the fun shapes in every one of our kits to make them easy to work with! Includes 10 preprinted and precut Shrinky Dinks, chain bracelet, 2 earring hooks, 10 jump rings, elastic loop and easy instructions. Recommended for children 5 years of age and older.