Preheat oven to 350 degrees F. Grease and flour a 9" x 13" pan.
Prepare cake batter as directed on package.
Pour cake batter into prepared pan and bake for 25 to 35 minutes or until toothpick inserted into cake comes out clean.
Let cake cool completely and remove from pan.
Pour 1 packet of Duncan Hines(R) Frosting Creations(TM) Bubble Gum Flavour Mix into 1 can of Duncan Hines(R) Frosting Creations(TM) Frosting Starter. Stir until evenly blended. Repeat with second packet and can.
Frost cake with the Bubble Gum frosting you just created. Transfer any additional frosting to a piping bag with a decorator tip.
Pipe borders and decorative elements. Decorate with candy and serve.