A colorful rope is displayed and shown to be one complete piece. The rope is then threaded through the opening of a plastic rectangle. Spectators can see the rope through an opening on one side of the rectangle. The magician then slides the two halves of the rectangle in opposite directions causing the rope to break between the two halves of the rectangle. A few magic words are said and the halves of the rectangle are slid back into place restoring the rope to one whole piece again! The rope may then be examined by the spectators.
Very easy to do. Very startling visual effect!