Today we went to Save the Bay Day at the Chesapeake Bay Foundation’s new Brock Environmental Center.  We walked around and saw the exhibits and then competed in an oyster filter challange.  Did you know that a single oyster will filter (completely clean) fifty gallons of water a day?  Brooke and Alex were on a team (with my help of course) to build a oyster filter.  We placed many many different items (coffee filters, sand, string, marbles, cotton balls, rocks, oyster shells, paper-towels) over the opening to a mason jar.  Then the program director poured very dirty water in it.  We competed with 3 other teams to see whose water would be filtered the best (i.e. be the cleanest).  Brooke and Alex won!  They got to pour their filtered water into a tank with living oysters and crabs to enjoy!  It was a cool experience.