PLACE berries in 6 dessert glasses. Add boiling water to jelly powder in medium bowl; stir 2 min. until completely dissolved. Add cold water and ice cubes; stir until ice is melted. Pour 3/4 cup evenly over berries. Refrigerate 20 min. or until jelly is set but not firm. Meanwhile, let remaining jelly stand at room temperature until cooled and ready to use.
ADD 3/4 cup Cool Whip to remaining jelly; stir with whisk until well blended. Spoon over jelly in dessert glasses.
REFRIGERATE 1 hour or until firm. Serve topped with remaining Cool Whip.