They are supposed to look like the photo in the link below.
I have never seen these in person, but have had many friends
who have talked about them over the years.
However I did find a website that talks about how to get them
started, but since I have never done it before didn't know if there
might be some tips I could learn from.
http://pictify.com/205221/rainbow-ro...cted-with-dyes