1 bag miniature marshmallows
2-3 cans crushed pineapple
1 can whipped cream or 1 tub Cool Whip

Pour marshmallows into large, deep bowl. Pour crushed pineapple on top of marshmallows. Chill and let set for at least 2 hours so marshmallows absorb pineapple juice. Top with whipped topping just before serving.