Tutu's are stinkin' cute. And if you have little girls, let me tell you right now, THEY NEED A TUTU. And since I'm so nice and helpful and all, I'm going to show you the easiest way EVER to make a tutu. Just in time for Halloween.... aren't I the nicest? SO, first things first, you need TULLE and ELASTIC. How much tulle largely depends on how full you want your tutu. More tulle = more fluff.
P.S. And yes, you should make one for yourself too-tu.