Preheat the oven to 200 degrees F (93 C).
Combine the cinnamon and applesauce into a small bowl, and knead together as you would bread dough. It should be about the consistency of sand when you are going to build a castle with it at the beach.
Stir in the glue if using.
Once you have a dough-like consistency, roll the dough out to about a one fourth of an inch thickness. I recommend doing the dough rolling on top of the ungreased baking sheet you are going to use to avoid ripping the soft dough apart transferring them from the counter or rolling pin mat to the baking sheet.
Use cookie cutters to create the design you desire.
Use a pencil or straw to poke a hole through each ornament where you want the hanging twine or ribbon to go.
Bake for about two and a half hours, or until hard. Do not overbake or the cinnamon dough ornaments will crack.
Place the ornaments on a wire baking rack to cool.
Allow the ornaments to cool completely and harden before threading twine or ribbon through the hole and hanging.