There are two balls in the vase. One is an actually ball that can roll and be hidden in your pocket, under a cap, in your sleeve, or where ever you want to be creative and hide it. The second ball is cut in half and glued to the bottom of the top. Follow these steps:
Step one: Take the actual ball out of the vase and place it somewhere hidden from the viewer.
Step two: Show the viewer that the ball is not in your hands
Step three: Show the viewer that the ball in no longer in in the vase
Step Four: Wave your magic hands and say some magic words
Step Five: Reveal the fake half-ball to the view still inside the vase
Its that simple! Contact me for questions!
You can purchase this magic trick here: http://www.penguinmagic.com/p/235