Master this secret in a flash!
You remove a silk from a crystal clear box. You make the silk vanish using your favorite method. At your command, in the blink of an eye, the silk reappears inside the clear cube! Of course, you could also just start with the empty cube, and make the silk appear inside of it!
Really attractive see-through plastic cube, trimmed in prism-cut mylar to give off a flashy effect on the edges. About 4" high and 4" wide.