When I was the food editor at Child Magazine, and it was for over 19 years, this suggestion always got rave reviews.
Whatever your kids favorite pasta is, cook a bunch on Sunday and keep it in a sealed bag, tossed with a bit of oil, for quick snacks or meals.
toss with tomatoes and peas and olive oil for an easy meal
toss with olive oil and grated Parmesan
bake with assorted shredded cheese and broccoli
make a pasta salad with shredded chicken and vegetables in a vinaigrette
stir fry with snow peas, zucchini and a little soy sauce