5 3oz. packages of Jello, any flavor
5 Cups Hot water
Get 10 different containers ready (cups or mugs work great) Pour jello flavors in 5 separate containers. Add 1 Cup of Hot water in each flavor. Pour half of each mixed flavor into remaining five containers. In the first five, add 2 Tbs. cold water in each mix. In the other five, add 2 Tbs. sour cream in each mix. Pour one container in a glass 9x13 pan. Refrigerate until set. Then pour one sour cream mixture on top and refrigerate until set. Continue alternating until all 10 containers are added. Add cool whip to the top before serving.
Speed method: put in freezer instead of fridge for a couple of minutes per layer. DO NOT LEAVE FOR LONG!