I saw this by Psychara Nd i thought this was cool as well...it didnt take me too long so make and i revamped it 2 times. I have a mix of single and double ended dreads. They are awsome!!!
http://www.youtube.com/watch?v=bSNATzS5X8s

PS you can use anything u want, wool dreads, cyberlocks, and yarn if you want.