This sweet dress was just too loose at Genevieve's skinny little middle. I discussed it my experienced friend Rebecca and on her advice, stitched on two-inch pieces of elastic, stretching it as I stitched, to tighten the elasticized waistband further. I used a small zigzag machine stitch. But the waistband puckered and curled too much for looking good.
So I ripped that off and made a dart at each waistband side seam. Much better!