Color Changing Pen by Jean-Pierre Vallarino
An extremely visual effect that will enable you to change the color of your felt pen FIVE TIMES, right in front of the spectator's eyes!
Green, red, blue, yellow, white... and finally with black. But this is not over! Something appears on the pen: the name of a previously selected card, for example.
You can even leave the pen for examination, or simply use it for the rest of your show -- it is absolutely normal!