8/8 - Seining the Lagoon at the Gumbo Limbo Nature Center, 1801 N. Ocean Blvd., Boca Raton. Explore the grasses and flats of the Intracoastal Waterway. Wear clothes that can get wet. No flip-flops or sandals. Ages 10 to adult. Held again 8/29. 10-11:30 am. $5/members, $8/non-members. Reservations: 338-1542 or www.gumbolimbo.org.