01 - In a medium mixing bowl, combine the red gelatin with 1 cup boiling water. Stir thoroughly until fully dissolved, then mix in 1/2 cup cold water.
02 - Evenly distribute the red gelatin mixture among 8 small clear serving cups. Refrigerate for at least 1 hour, or until the layer is completely set.
03 - In a separate medium bowl, whisk together instant vanilla pudding mix and 1 1/4 cups cold milk for about 2 minutes, until smooth and slightly thick. Gently fold in 1 cup whipped topping.
04 - Once the red layer is set, spoon the vanilla pudding mixture gently over the red layer, dividing evenly among the cups. Chill for 30 minutes to allow the layer to firm.
05 - Stir the blue gelatin into 1 cup boiling water in a clean mixing bowl until dissolved, then blend in 1/2 cup cold water.
06 - When the white layer has firmed, gently pour or spoon the blue gelatin mixture over the pudding layer. Place the cups back in the refrigerator and chill for an additional 2 to 3 hours, until all layers are fully set.
07 - Before serving, decorate with extra whipped topping, fresh berries, and festive sprinkles if desired.