From the kitchen of Stephanie Knewasser.  
Kids have an easier time eating shells than
fettuccine, but the sauce recipe is exactly the
same.  My kids & all their friends love this.  I
always have some sauce in the freezer for a
quick meal.
Alfredo sauce (freezes great!):
 8 Tbsp butter
 1/4 c heavy cream
 1/2 c romano cheese
Cream butter until light & fluffy.
Beat in cream, a little at a time.
Gradually add cheese.

Set oven to 250.
Put alfredo sauce in ovenproof serving dish
(I use a 13x9 pyrex) & warm until melted.
Don't let brown.

Cook  1 box of shells,
according to directions.

Toss to coat cooked shells & alfredo sauce.
Season to taste with salt & pepper.
Shells Alfredo
Shells Alfredo: 1 batch Alfredo sauce & 1 lb small shells
Alfredo Shells with veggies
Alfredo Shells with Veggies: make as above.  Cook 1
bag frozen mixed veggies, toss with 1-2 Tbsp butter,
season with salt.
"Everything I eat has been proved by some doctor to be a deadly poison, and everything
I don't eat has been proved to be indispensable for life.  But I go marching on."
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Alfredo Shells