PBCB joined 45 other exhibitors at Brewster Conservation Day on July 8, informing and delighting the 800 event visitors. Representing PBCB, Executive Director Charlie Sumner, Science Program Director Sarah Griscom, and Board members Lyndy Rogers and Suzy McDowell lent a hand at the exhibit which focused on fresh and salt water salinity levels. As always PBCB made the science FUN! Kids (and adults) learned how to use “refractometers” (which measure the density of a liquid) to see just how “salty” various water samples were. Salt makes water denser! The kids tested Pleasant Bay water, and it came in at nearly 30% – which helps to keep us afloat!