Some of my most treasured memories are of sewing side-by-side with Granny on her treadle and me on her MIL's treadle.
She taught me to sew--I will be getting my grandmother's machine in a week or two after losing my dear aunt. I'm sure this will be a special memory for your DGD for the rest of her life.
Tell your sweet Grandbaby that her quilt is gorgeous and that she needs to join us on this board.