2 pkg. (4 serving size) strawberry Jello
5 c. boiling water
2/3 c. sour cream or vanilla yogurt
2 pkg. (4 serving size) lime Jello

Dissolve strawberry Jello in 2 1/2 cups boiling water. Pour 1 1/2 cups into 6 cup ring mold. Chill until set, but not firm. Chill remaining Jello in bowl; gradually blend in 1/3 cup sour cream and spoon over Jello in bowl; gradually blend in 1/3 cup sour cream and spoon over Jello in mold. Chill until set, but not firm. Repeat with lime Jello, remaining 2 1/2 cups water and 1/3 cup sour cream, chilling dissolved Jello before measuring and pouring into mold. Chill at least 2 hours. Unmold.