9/21 - International Coastal Cleanup at Gumbo Limbo Nature Center, 1801 N. Ocean Blvd., Boca Raton. Sponsored by the Ocean Conservancy and Keep Palm Beach County Beautiful Inc. Individuals must pre-register with Gumbo Limbo; community service hours awarded. All ages. Adults must participate with children under the age of 18 . 9-11 am. Free. Reservations: 544-8615.