If you'd like, you can decorate your cookie shapes with polymer candy. (Actually, you can decorate "raw" cookie shapes and add uncured cady for a single, longer curing time, but we find it easier to decorate the cookies in steps. Do whatever suits you best.)
You can make almost any candy imaginable-- nuts and raisins, too! With a little time, you can create a millefiori cane that will yield hundreds of slices that resemble peppermints and other favorites. Jelly beans and M&Ms are even easier to make. But to add a little sparkle to faux gingerbread, there's nothing like polymer gumdrops!
Start by conditioning small amounts of candy-colored clay. ("Candy-colored" can be any color you like, of course.) If you want to increase the realism, use a lot of translucent clay in your mixes.
If you want many gumdrops in the same size, roll out the different colors of clay into sheets of uniform thickness. To make small gumdrops, use a short piece of a plastic drinking straw to punch circles from each sheet. (Very small cookie cutters can be used for larger gumdrops. You can also make uniform gumdrops by slicing a snake of each clay mixture into even segments.) Roll the circles into balls. Drop the balls into iridescent glitter and roll until covered.
Form the balls into gumdrop shapes. We do this by holding a ball against one finger of the right hand. This side becomes the flat bottom of the drop. Gently pinch the other side a couple of times with the fingers of the left hand. (This can take a little practice. If you find another way that works better for you, by all means, use it instead.)
Place the finished gumdrop on the baking surface, and when they're all shaped, cure them briefly (10 minutes, perhaps) to make them easier to handle, later on.