In a small saucepan, combine baking pieces and shortening. Cook and stir over low heat until melted. (Or, combine baking pieces and shortening in a microwave-safe bowl. Microwave on 70-percent power for 1 to 2 minutes or until baking pieces are melted, stirring every 30 seconds.)
Transfer melted baking pieces to a 1-cup glass liquid measure. Dip the top half of each candy cane into the melted chocolate, tilting cup if necessary to coat candy cane. Immediately sprinkle with or roll in decorative sugar, nonpareils, or jimmies. Place on a waxed paper-lined baking sheet. Let stand for at least 1 hour or until chocolate is firm.