We had this salad at a good friend's house awhile ago. It was so good, I had to ask for the recipe! I did make a couple of slight adjustments but I'm posting the original recipe so you can decide for yourself :-) my favorite part about this is it doesn't have a strong seafood taste to it (which means even picky little kiddos will eat it).
1 lb. Macaroni noodles, cooked and drained (I prefer large elbow but you could use shells or those tiny circular macaroni salad noodles )
1 or 2 cans of tiny canned shrimp drained (I prefer 1)
4-5 stalks of celery, diced
3-4 green onions, sliced thin
1 can of olives, drained and finely chopped
1 3/4 cup of mayo (I prefer 1 1/4 cup of mayo plus half a cup of plain Greek yogurt or sour cream)
Salt and pepper to taste
Simply toss everything together, mix well and chill for a couple of hours before serving!