Rainbow Cake
["2 baked 8 or 9-inch white cake layers, cooled", "1 (3 oz.) pkg. Jell-O (any flavor)", "1 c. boiling water", "1/2 c. cold water", "1 (8 oz.) container Cool Whip"]
["Place", "cake layers, top side up, in 2 clean layer pans. Prick each", "cake\twith", "serving", "fork", "at 1/2-inch intervals. Dissolve Jell-O", "in\tboiling", "water.", "Add cold water and pour carefully over cakes.", "Chill 3 to 4 hours."]
["white cake layers", "O", "boiling water", "cold water"]