Put in a few boxes of postcards. Take the rope, the end of which is also lower in boxes. Then lift it up high. At the end of a rope was fastened node postcard!
The secret is simple. Need two small magnet. One glued on the inside of the end of the braid rope. There is a small piece of the same rope. It loose knot tied postcard. At the other end of this secret piece of rope glued another magnet. Secret rope with a knot and postcard in advance hidden in a box.
Is lower there other cards and start in boxes rope end, as the magnets will be connected. It turns out that one of the cards itself began node that and see the audience.