I love this skirt so much! It is called a twirly skirt, and you can find the instructions here at House on Hill Road.
The verdict? The instructions are clear and easy to follow, and as evidenced by these photos, the skirt is, indeed, twirly! Best thing is, it only took me around a half hour to make it from start to finish. Easy Peasy Lemon Squeezy! I think it took me longer to pick the fabrics than to make the skirt. I didn't decide to make it until 11.30 at night, and by 12.30 it was all done. So get yourself a yard of fabric and make a twirly skirt for a cute little girl in your life - or get a couple of yards and make one for yourself!