Coin Penetration Tube

  The basic effect is  that you  separate the two halves of the tube and place a half dollar in the center, and then reassemble the tube. The coin now blocks the center of the tube, so nothing can pass through  You drop quarters into the tube to show that they cannot pass through the center. Repeat and say the magic word and one coin passes through the tube! This is repeated with all four coins.  Easy to perform