Cut frozen pound cake into 1-inch cubes. Spoon canned frosting into a bowl; tint with gel food color as desired. Microwave frosting 10 to 15 seconds at a time until it’s the consistency of heavy cream. With a fork, slip each cube into frosting to coat (let drip into bowl; tap fork to remove excess). With a dull knife, slide frosted cake onto foil-lined baking sheet.
Decorate some with sprinkles. Using tube of decorating icing, pipe message on others.
