Frozen Fruit Cups

1 (8 oz) tub Cool Whip
4 c marshmallows
1 (16 oz) package frozen strawberries
1 (15 1/4 oz) can crushed pineapple

Mix ingredients in large mixing bowl. Line muffin tins with paper baking cups. Fill cups and let stand in freezer until hard. Remove fruit cups and store in plastic bags or covered containers until ready to serve. Serve partially frozen.