Cut the sleeves off at the shoulder just before
the seams. This is where you'll put your head.
Roll up the bottom and sew using the embroidery
needle and yarn. A simple stitch will suffice, but feel free to
be as adventurous and decorative as you like.
Tie a knot at the wrist and you're done. If you
want a more finished look, cut the top off and sew closed using
the same yarn.