La corde zig-zag (Zig-Zag rope)
This remarkable little device will fool the pants off of anyone who sees it. You show a small length of ordinary rope and slide it into an interesting and celestial looking box. Before they have a chance to blink you slide the box cutting the rope into two separate pieces ! But wait, it gets better ! You immediately slide the box back together and remove the rope unharmed and back to one piece ! Very easy to do !