You hold a black color wand in your hand and try to do some magic. The magic doesn’t happen since you need a red color wand to do it.
So you pass your hand over the wand and presto, it changes into a GREEN color wand!

Since you don’t want the wand to do magic on it's own ...You pass your hand over it one more time and it changes back into a black wand!

Even spin the wand to show that it is absolutely normal! This can be repeated any number of times! Very visual and very easy to do.

Color Changing Wand Black to Green