I have a boy who is 7 and a girl who is about 2. Whenever he outgrows a really cool t-shirt, I always hold on to it for a while thinking I might put it on my daughter someday. But that wouldn't be totally fair, right? Girls like to dress girly right? Dresses and frills? LOL. I've been doing t-shirt reconstruction for myself and other custom orders through http://www.etsy.com/ in adult sizes, so I thought, why not just turn his t-shirts into dresses for her? What I came up with is a simple Do It Yourself project to turn your own Big Brother hand-me-downs into cute recreations for Little Sister.
You'll want to trim the shirt to fit across the chest and slightly flare out at the bottom. You'll have to establish the armhole size by where you begin to sew the sides together.
Laying the shirt face down, cut straight across the back from one seam to the other.
Pull the thread tight as you gather the fabric along the center of the neckline.
Select a fabric for the trim. You'll want this to be very stretchy. Some fabrics stretch in certain directions. Make sure to test your fabric's stretch before cutting.
This is a simple process, but for those without the right tools for the job, it can be a pain. If you like the idea of having this done, but can't forsee doing it yourself, I offer t-shirt reconstruction services. For the above process, you would send me a package of t-shirts and I'd reconstruct them into girl's dresses, starting at $5 each.
Please see my shop at http://www.arthiel.etsy.com/ and convo me for details.