You show a rope that is half red and half yellow. You tie a knot on each color of the rope and the knots mysteriously change places. The yellow knot jumps onto the red rope and the red knot jumps on the yellow rope. The rope can be handed out for inspection. Very easy to do. Packs flat and plays big.
The rope is about 3' in length and is made of very high quality, bright colored, soft crotchet material.