|Ignore the garbage bag.|
-An ankle-length or longer skirt, preferably one with a frilly edge.
-needle and plenty of thread
Optional: turn a pillow into a bustle for added butt.
Get your skirt and threaded needle. Tie a series of knots in the end of your thread. Flatten your skirt out and mark it so it you can see the back half clearly.
Thread the needle into the back of the skirt, into the inside and pull it up to the top, a few inches below the top. Pull it through until the material is ruffled to your satisfaction, cut and tie several knots.
Move along a few inches in repeat, only going an inch higher, cut, tie off. Then do two more right up at the waistband, one on the same level as the second thread, and another on the same level as the first. If you want more ruffles or are using weak threads, add more, but keep it as even as you can.
The best thing about this is that it can be done and undone in five minutes, to change up any skirt. Making a skirt to go under it is just as easy too, and most of your long skirts will be good underskirts.
Have fun with this and post pics! <3