In medium microwavable bowl, microwave candy melts uncovered on Medium (50%) 1 minute, then in 15-second increments, until melted; stir until smooth. Stir in 1/2 teaspoon candy coating. Stir in oil. 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 cake ball into melted candy to cover; tap off any excess. (Reheat candy in microwave or add oil if too thick to coat.) Poke opposite end of stick into foam block.