Crystal Dye Illusion - Warren Stephens

Transparent plastic tube with a colored sikl in it is displayed an dthe silk is removed. The tube is clearly shown and the silk is tucked into the upper end of tube. As the silk emerges from the lower end, it is seen to be changing color. When silks is halfway thru the tube, the tube is freely shown with the silk half one color and half the other! As the silk is pushed further thru the tube it changes completely to the second color. Silk is removed from the tube and it and dthe tuabe are lagain freely shown. Never used and in great condition!