If you really want to feel the effects of voltage do what I did when I was about 11. I had an electric race car set as most kids did at that time. My car wouldn't work one day and I didn't know where my dad's meter was to test the power supply. So I did what you do to test a 9v battery....I put my tongue on the track and pulled the trigger. Holy #$#&^ @#$& !!!!!!! I seen the Sun and the Moon, not just stars. The worse part was it crippled my muscles and I am not sure how long it took for me to drop the gun. Last time I ever did that......but I did find out it was the car that was toast not the power supply. [:@]