To start your dream catcher, tie a length of thread to your ring. For more detailed instructions on how to create the dream catcher, see here http://www.nativetech.org/dreamcat/dreminst.html
When you finish weaving, however, tie the thread in a secure double knot in the center, rather than letting it hang down.
I found that it is easier to create the dream catcher using needle.
After tying the knot in the middle, snip off the excess thread.