One of the techniques I am learning with this first applique block is a “Suffolk Puff” aka “Yo-yo” with a turned edge. You stitch around the edge of your circle about 1/8″ in, insert a circle template, cinch it up and iron. Then you remove the template and stitch right on that folded edge, cinching it up a second time to form the little puff. This block is meant to be maple leaves but there’s some artistic license here as that puff in the center with little French knots in it seems much more like a flower than a leaf.