The Pekinese Stitch is a sweet and simple embellishment that starts with a basic back stitch. This stitch would be a darling way to trim the hem of a little girls dress.
Start with a line of back stitching. (Note that entry points #2 and #4 go into the same point.)
Come up with the second thread color at the bottom of the back stitch line (brown point #1).
Thread the second thread through the second back stitch. Lead with the eye of the needle (as opposed to the sharp end) to avoid splitting the backstitch threads.
And then double back and thread the needle through the first backstitch.
Repeat this until the end of the back stitches and enter back into the fabric at brown point #2.