Mix, shape, and mold colorful polymer clay to create durable charms, beads, bookmarks or minifigures. Polymer clay needs to bake 15 minutes for every ¼” of thickness. Once baked, polymer clay is very hard and can be painted with acrylic paints or sealed with a clear finish. Finished charms can be attached to key chains or necklaces. Grades 6 through 12.