Pistachio Salad

1 large pkg pistachio pudding
1 large 19 oz can of crushed pineapple (do not drain)
1 large container cool whip
1/2 pkg mini marshmallows
1 can mandarin oranges (drain)

Mix pudding with pineapple plus juice until thick. Mix in cool whip. Mix in marshmallows. Mix in oranges. Refridgerate.