I made these friendship bands a while ago using black wool, embroidery thread and some old shampoo containers made of thin, flexible plastic. First I cut the shampoo container into thin strips about 1cm wide by15cm long. I then used small nail to punch holes in the ends of the plastic strips. Next I wrapped each strip with black wool, making sure that the plastic was completely covered by the wool wraps. And finally, I went a little crazy wrapping the embroidery thread over the wool. To finish each band off I used a needle to thread the ends of the wool and embroidery thread throught the holes in the plastic and knotted them securely before plaiting the ends so the bands could be tied on.