Cut out the back pocket around the seam so that you have both layers still sewn together.
Decide how long you would like the handle for your purse and cut a piece of ribbon or lace the appropriate length (make sure to add a little length to sew onto the back of the pocket). Sew into place on the wrong side.
Add any embellishments you might like (lace, buttons, patch, etc.). For this one I sewed on a scrap piece of lace. You could also use fabric glue if you wanted to add something in the middle of the pocket so that you don't sew through both layers and close the pocket.
Here is a picture of the finished product.
At birthday parties here in South Africa, every child that comes gets a "party pack" or something to take home with them, usually a bag full of sweets and maybe a toy. We used these as the party packs for all the girls that came to Marissa's birthday party.
