Easter Pistachio Pudding Salad

1 (3.4 oz)  package instant pistachio pudding
1 (20 oz) can crushed pineapple, undrained
1 (15 oz) can mandarin oranges, drained
1/2 cup shredded coconut
1 (8 oz) tub Cool Whip
1 cup miniature marshmallows

In large bowl, combine dry pistachio pudding mix and the can of crushed pineapple with juice. Stir until pudding mix is dissolved. Let sit a few minutes (pudding will begin to thicken). Add the mandarin orange and coconut, and stir gently to combine. Fold in Cool Whip and marshmallows.  Chill for a few hours (or a quick chill in the freezer) or overnight.