This dress literally took me about 15 minutes! There are several similar tutorials out there I think, but here's my version!
To make it, I trimmed the t-shirt off, and cut jersey fabric that was twice the width of the bottom of the t-shirt. Then I ruffled the jersey, sewed up the sides to make it a tube....
and sewed it on to the bottom of the t-shirt.
Then I cut a few inches of strips of extra jersey and rolled them up into flower shapes, and sewed them on with the machine! Easy!
More pics and fuller tutorial on the blog! http://www.rufflesandstuff.com/2010/01/its-playdress.html