In a large mixing bowl, fold the Cool Whip (or whipped cream) until light and fluffy.
Add well-drained fruit: mandarin oranges, pineapple, and cherries. Gently fold to combine.
Stir in coconut flakes and mini marshmallows. Add any optional fruit or mix-ins if using.
If desired, mix in sour cream or softened cream cheese for a tangier flavor and thicker texture.
Cover the bowl and refrigerate for at least 2 hours or overnight.
Before serving, give the salad a gentle stir. Spoon into a serving bowl and top with extra fruit, coconut, or pastel sprinkles if desired.