Combine sugar, cream, and vanilla. Mix well and set aside. Cut graham crackers diagonally in half using a gentle sawing motion with a serrated knife (cutting in a firm motion will break the crackers). Spread a small amount of frosting over the top side of a cracker half. Top with remaining cracker half, placing cut sides opposite each other so two narrow ends meet to form reindeer nose.
Spread a small amount of frosting to cover the top cracker. Gently press chocolate chips on reindeer for eyes and cinnamon candy for nose. Add pretzel halves for antlers. Repeat procedure for remaining ingredients. Let dry on a wire rack. Makes 12.