This trick is bound to get their attention. You show a black pocket knife and close your hand around it. When you open your hand, the knife has now turned white. Now you take out a second black knife and hold it in your other hand. Just a squeeze and both knives now change places. Again, the Color Changing Knives is a trick that’s very easy to learn.

Module 1 Color Changing Knives
Unit 1 Color Changing Knives