From: gmad@wvdsl.net   
      
   I would like to build a shocking device similar to the prank 'gum' shocker   
   or the pens that shock you when clicked.  This is for my class room   
   experiment so it should be low power like the gags one can buy from gas   
   stations.  I know how to build a shocker from a set of points from a car   
   but this has too much power.   
      
   How do the trick gum gags work?   
      
   Thanks in advance   
   Greg   
      
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