It was really his idea and the past two years he made them mostly by himself. This year I shaped all of them. He put the "knuckle" marks and the fingernail on them.
You can find many recipes with lots of variations on the web. Just use "finger cookies" for your search argument. Our personal variation is to put a bread sitck in the cookie. We make the bread stick almost as long as the cookie and leave it hanging out the end like a broken bone. The change in texture from sugar cookie to bread stick adds a terrifying dimension to eating one of our cookies. That texture change makes you think of brittle bones.