Start by draining the canned pineapple tidbits and mandarin oranges. Make sure to remove any excess liquid to prevent the salad from becoming watery. Place these fruits in a large mixing bowl.
Carefully add the maraschino cherries to the bowl with the pineapple and mandarin oranges.
Next, fold in the mini marshmallows.
In a separate bowl, combine the thawed Cool Whip and sour cream. Stir well until the mixture is smooth and creamy.
Gently fold the creamy mixture into the fruit and marshmallow combination.
Cover the bowl with plastic wrap or a lid and place it in the refrigerator for at least 1 hour.
