Using your sewing machine, or hand embroidery, make a small circle of stitches or a few zigzag stitches back and forth for the eyes on the right side of fabric for one of the top half pattern pieces. Some machines have various embroidery stitches that you can also use to give a more elaborate look. Set aside.
Cut your 3” of string into two even pieces 1.5” in length each. Pin one edge of each string to the bottom of the top half pattern piece that already has the eyes embroidered on, where the antenna markings are located. Baste stitch 1/3” away from the edge to secure.