01 - In a medium mixing bowl, completely dissolve the red gelatin powder in 1 cup boiling water. Blend in 1/2 cup cold water. Distribute the mixture evenly among 8 small clear serving cups. Place cups in the refrigerator and chill for at least 1 hour, or until the layer is fully set.
02 - In a separate bowl, whisk together the vanilla pudding mix and 1 1/4 cups cold milk until thick, approximately 2 minutes. Fold in 1 cup whipped topping for a smooth, creamy texture. Once the red layer is set, spoon the pudding mixture atop the gelatin, spreading evenly. Refrigerate for 30 minutes until lightly set.
03 - Combine the blue gelatin powder with 1 cup boiling water in a clean bowl, ensuring complete dissolution. Add 1/2 cup cold water and mix well. Once the white layer is set, carefully spoon or pour the blue gelatin mixture over the pudding layer in each cup.
04 - Refrigerate the assembled cups for 2 to 3 additional hours, or until all layers are thoroughly set and firm.
05 - Just before serving, top each cup with a dollop of whipped topping, fresh berries, and sprinkles if desired for visual appeal.