furby
A small, nylon-fur covered nuisance given to children to scare them out of real pets.  Spying device (See military code specifying that furby may not enter areas where special clearance is required.) And general boon to the working adult, furby is nothing more than a bit of backfired reverse-psychology.
"174. Furby ® is not allowed into classified areas. (I swear to the gods, I did not make that up, it's actually DOD policy)."
---Quoted from SkippyList.com