I have recently made 2 of these and they are relatively easy to make. The first skort was made out of a small floral print with contrasting floral shorts:
I used a freezer paper template to stitch the scalloped edge. This is certainly easier to do than cutting the scalloped edge and stitching a 1/2 inch seam and I think it makes for an more accurate finish. (Have you realised how much I love freezer paper?)
The second skirt was made from a pretty Japanese cotton/linen blend Echino fabric
And here is Rosa in her badminton skort:
Oliver + S badminton skort with Ottobre t-shirt 19 - 3/2011.
The belt and hair decoration are Rosa's own!
I made the t-shirt from an Ottobre pattern (number 19 in 3/2011) and used 2 prints from craftyscientists at Spoonflower to make it. The front is made from Anne plays the Pipes (http://www.spoonflower.com/fabric/1622232) and the back is The Jazz Band (http://www.spoonflower.com/fabric/1622237). I needed less than a fat quarter of the knit fabric to make each side.
Spoonflower is a fantastic source for fabric prints that can really change a simple pattern to something that is special and unique. After all, which little girl doesn't like a fairy?