Shocking discovery

We discovered something “shocking” today!  Kevin likes to wear those “blinking” shoes–you know, the kind that flash different colors whenever you step or stomp your feet.  I had originally thought they used some sort of mercury switch that made contact whenever you took a step, but now I’m not so sure.  Kevin was playing with his energy ball and I noticed that whenever he touched it, his shoes would start blinking frantically!  I guess just enough energy is released through Kevin and into his feet and shoes to set off the light switches.  I find this fascinating, but now I’m wondering just what’s happening and how these shoes really work.  Anybody else know?  I’m going to have to start doing a little research on this before it drives me nuts now.