1. Mix unflavored gelatin with cold water.
2. Pour thawed drink concentrate into microwave-safe glass measuring cup. Microwave on HIGH for 1-1 1/2 minutes.
3. Stir hot concentrate into gelatin mixture and pour into ice cube trays. Refrigerate for 2-3 hours.
4. Remove gelatin cubes from ice cube trays and decorate with whipped cream, icing and sprinkles.