Soften the gelatin in the water. Stir over low heat until dissolved. Mix in the juices, sugar and sliced fruit, and place in the freezer until almost set. Beat with an electric mixer on high speed until creamy, but fluffy. Cover and return to the freezer. If fruit ice is made some time before serving, it must be rebeaten and then returned to the freezer for a brief period. Yield: 8 (90 calorie) servings.