Directions:
1. Place cakes, top sides up, in clean 9-inch round pans; pierce with large fork at 1/2-inch intervals.
2. Add 1 cup boiling water to each flavor dry gelatin mix in separate small bowls; stir 2 min. until completely dissolved. Pour red gelatin over 1 cake, then pour blue gelatin over remaining cake. Refrigerate 3 hours.
3. Dip bottoms of cake pans in warm water 10 sec.; unmold cakes. Fill and frost cake layers with COOL WHIP. Refrigerate 1 hour