Performer shows two small silks, one red and one yellow. He ties a knot in the silks and attempts to fuse the silks to a single silk, but nothing happens.
Then with a wave of the hands and a few magic words the knot vanishes and the two silks have fused into one another. Performer is now holding a single large silk half red and half yellow.

Comes complete with all the required silks and detailed instructions for different types of handling, ranging from those requiring absolutely no practice, to more effective and direct presentations involving a modest amount of practice.