Iron the double-sided interfacing onto the conductive fabric. Cut out the fabric pattern, then use the water-soluble marker to trace the controller buttons onto the conductive fabric and cut them out.

Materials: Wool coat, heavy patterned fabric (upholstery fabric is recommended), double-sided interfacing (Wonder-Under sells for $3.99-a-yard at JoAnn’s Fabric & Craft Stores), sharp fabric ...