I don't often add whipped cream 'salads' to my site because my website is a collection of recipes that I've found or made up that I actually use or have an interest in.  I am not a fan of jello or fruit salads and I find most to be stomach turning.  But!  I know others like them and this is one that my Mother loves.  Who knows, maybe when I'm 75 I'll like them.  As of right now I would eat this if it were the pudding, (fresh) whipped cream and the crushed nuts together but once the marshmallows and... gulp... crushed pineapple are added, I just can't do it. 
For those that have loved this salad/dessert for years... this one is for you.  Certainly not me!  Ha.
Watergate salad
1 - 8 oz. cool whip
1 box (small) of  pistachio pudding mix
1 - 8 oz. can of crushed pineapple
1 c  of mini marshmallows
1/2 c of crushed pecans (optional)