Crystals and Essential Oils at Clarke County Recreation Center in Chet Hobert Park (225 Al Smith Circle, Berryville) is open to ages 14 and up. Learn about crystals, essential oils, and how to use both to create crystal gemstone roller bottles. Fee is $4. Contact Parks & Recreation at 540-955-5140 or ccpr@clarkecounty.gov, or go to the recreation center to register.