Place a sweater in a mesh laundry bag; wash sweater in hot water, and tumble dry to shrink it. Cut off sleeves (reserving them), and cut up the middle of the front of the sweater. Use fabric glue to attach metallic ribbon or other trim along the opening and around neck, as shown. For the hat, trim the cut end of a sleeve straight. If it is large and stretchy enough, the sleeve can be used as is; just fold the bottom for the brim. If it is not big enough, cut both sleeves open at their seams and sew together, making a wider tube.