Color Change Knife

Is it black or is it white? It's black. No, it's white! The Color Changing Knife does just what it says, changing colors in an instant as you pass it through your hand. Both sides are white; now both sides are black. Dizzy your audience and keep them guessing. When you think they've had enough, make the knife vanish and reappear in your pocket. Go ahead, pass it out for inspection; they'll get even dizzier when they see it's just a plain old everyday knife. Instructions included.