You shake a silk and produce a second silk, tied to the corner of the first silk. You unknot the silks and place away the first silk and then produce a third silk, tied to a corner of the second silk. The production can go on for a long time, however you are supplied with five 45x45 cm (18 inch) silks and instructions. The silks are unprepared so you can use them in other effects or add some of your own silks for a larger production.