1Heat oven to 350°F. Make and bake cake mix as directed on box for 13x9-inch pan, using water, oil and eggs. Cool completely.
2Line cookie sheet with waxed paper. Crumble cake into large bowl. Add frosting; mix well. Shape into 28 (1 1/2-inch) balls, placing cherry in center of each and covering cherry completely. Place on cookie sheet. Freeze until firm. When cake balls are firm, transfer to refrigerator.
3In medium microwavable bowl, microwave candy coating on Medium (50%) 1 minute, then in 15-second increments, until melted; stir until smooth. Remove several cake balls from refrigerator at a time. Dip tip of 1 lollipop stick about 1/2 inch into melted candy and insert stick into 1 cake ball no more than halfway. Dip each cake ball into melted candy to cover; tap off excess. Poke opposite end of stick into foam block. Sprinkle cake ball with sugar crystals. Let stand until set.