The Prince William Symphony Orchestra Percussion Ensemble will perform at the Potomac Community Library on Sunday, February 21, at 2:00 p.m.   The Percussion Ensemble will present an informative and fun concert which will take the listener through many sounds, rhythms and styles of music from around the world.  Using instruments made of wood, skin and metal which are shaken, struck or plucked, these talented musicians will open up a new world of music for listeners.  Light refreshments will be served after the concert. Registration is recommended, but not required, begins January 21, 2010.