In 2-cup microwavable measuring cup, microwave yellow candy melts as directed on package until melted. Remove several cake balls from freezer at a time. Dip top 1/2 inch of each lollipop stick into melted coating and insert 1 inch into each cake ball. Dip into melted candy to cover; very gently tap off excess. (Reheat candy in microwave or add vegetable oil if too thick to coat.) Poke opposite end of stick into styrofoam block. Let stand until set.