Silken Sands by Devin Knight _ TrickA novel and flashy effect that your audience hasn't seen before. This was a limited release a few years ago. Now you can make it up yourself in less than an hour, using items found in most of the larger box stores. NO TOOLS of any kind required to assemble! Effect: The performer shows a metal bowl to be empty. He then puts in three large handfuls of different colored sands, red, blue, and yellow; saying from these base colors, all colors can be made.