Anonymous wrote:My kids only eat mac n cheese with a roux and mild cheddar. No Kraft, no Stouffers, and definitely no Velveeta. They will accept different pasta shapes, however. Kids are generally inflexible.

It's good to know your kids, but your kids are not the most common denominator. And in OP's case, she's making a large put of M&C for a group of kids. If she wants to please the most kids and make sure the largest number of them will actually eat what she makes, she should use Velveeta, American or some other highly meltable, cheese.