Baked Christmas ornaments can be made from an inedible dough (salt, baking soda, cornstarch, or applesauce and cinnamon), or from real sugar cookies or gingerbread. Use a chopstick to punch a hole in the top before baking, so you can put ribbon or string through it to hang.
Great idea for modern, matte, textural white Christmas ornaments or baby foot ornaments
DIY Christmas gifts kids can make - cornstarch ornaments
christytomlinson: 2012 Twelve Artsy Ornaments of Christmas
Baking soda/cornstarch clay, cut with cookie cutters and oven-dried, painted and "piped" with squeeze bottle fabric paint.
Glittery Cornstarch clay ornaments
Turn Bonne Maman Jars into Holiday Table Decorations and Gifts
DIY Baking Soda Clay Ornaments