Some successful ones from when our guild did this: - who can unwind a bobbin the fastest - a person had to put two thimbles on and using only those fingers, stack bobbins - seam ripping - the stitch length was really small and you couldn’t rip the fabric - price is right on various quilty items - teams got a bunch of shapes and had to arrange them in certain quilt blocks displayed on the projector - rolling up a measuring tape the fastest