Festive Ribbon Jello
["6 1/4 c. boiling water", "1 c. (1/2 pt.) sour cream", "5 (3 oz.) pkg. Jell-O (assorted flavors)*"]
["*Start off with deepest color (grape), then strawberry, then lime, then orange, then lemon."]
["boiling water", "sour cream", "O"]