In a small bowl, combine lime jello and 1 packet of unflavored gelatin, stir Add 1 cup boiling water and stir 2 minutes or until dissolved Add jello to shot glasses, fill about ? way Place in fridge for at least 20 minutes, longer is fine Repeat with 1 cup boiling water, lemon jello and unflavored gelatin, and then grape jello Fill shot glasses and place in fridge for at least 20 minutes for each layer Up to 1 hour before serving, add Cool Whip to the top and sprinkles if you like Adult Version: Add 1 cup boiling water to 1 box of Jell-O and stir to dissolve. Add ¾ cup vodka and ¼ cup cold water, stir to combine Add to shot glasses and chill Note - this is for a single flavor Notes: You can easily double the recipe to serve more. Prep time does not include chilling time. Serves: 15 2-oz shot glasses