STIR boiling water into dry gelatin in medium bowl at least 2 min. until completely dissolved. Stir in cold water.
POUR into 9-inch square pan. Refrigerate 4 hours or until firm.
CUT gelatin into 1/2-inch cubes; spoon evenly into 6 dessert dishes. Top each with 1/3 cup of the fruit and 2 Tbsp. of the whipped topping just before serving.