HEAT oven to 350°F.
PREPARE cake batter and bake as directed on package for 24 cupcakes. Cool cupcakes in pans 10 min.; remove to wire racks. Cool completely.
PLACE nonpareils in small bowl. Spread frosting onto cupcakes; dip tops, 1 at a time, in nonpareils.
USE decorating gel to decorate cupcakes to resemble baseballs as shown in photo.