This dress for Addie is made from a tshirt from my girls (size M - adult). I just took up the side seem and shortened the length. With the extra material I cut off the bottom I added the ruffle. The neckline was a little big so I made a gather and attached a button. I have three other tshirts to make into other clothes for her too.
The legwarmers were made from a ladies pair of long socks. You cut off the toe and heel and reattach the middle piece to the sock by serging. These really help protect her "crawling" knees right now. And she looks cute in them too.