Doll clothes are too hard to make because they are so small. I would cut some 5 or 6 inch quares and let her sew them together for a doll quilt. My younger great granddaughter can't wait until she can use the sewing machine to piece a strip quilt, but she is too short at 7 to reach the foot control on the machine.
And you might want to see if she would like to learn embroidery. I started embroidering at about 10 and loved it. Whatever you do, I know she will love it. froggyintexas