Begin by bringing 2 cups of water to a rolling boil. Remove the saucepan from the heat and immediately whisk in the Jell-O powder until fully dissolved and the liquid turns glossy and smooth.
Next, carefully pour in the chilled sparkling white grape juice cocktail. Stir gently to combine, preserving the effervescence that gives these shots their lively texture.
Prepare a sheet tray lined with 28 plastic 2-ounce shot glasses or small containers of similar size. Distribute the Jello mixture evenly among the glasses, filling them almost to the brim. Secure each with a lid or cover to prevent any contamination during setting.
Transfer the tray to the refrigerator and chill the shots for 2 to 4 hours, or until fully set and jiggly to the touch.
Before serving, top each shot with a sprinkle of colorful sprinkles for a festive finishing touch. Serve chilled and enjoy the playful burst of flavor with each bite.