A length of ribbon is drawn through the hand and changes into a different color. Pass it through the hand again and it changes back to the original color. This model has two tassels attached to the ends of the ribbon. This addition makes the illusion much more convincing and deceptive, as the tasseled ends are never out of sight, eliminating any possibility of a change. You just hold a tassel and draw the ribbon through your other hand, and the ribbon changes color...its just that easy. Pull the other tassel, and the ribbon is back to original color. Very easy to do, comes ready to work with instructions.