So easy- if you can put the cords into the box, you can do the trick!
Two cords are threaded through a red box with the picture of a witch on it. The cords extend out of the box through holes on the sides. You can tie two of the cords together around the box, to prevent the witch from escaping.At your command, when you pull on the cords, the cords pass right through the box!
WARNING: CHOKING HAZARD. Do not put the box in your mouth. Not suitable for children under 5 years of age.
And that's all you need!