Marblehead Meanderings: Tide-pooling Trek at Chandler Hovey Park. Mass. Audubon Society Ipswich River Wildlife Sanctuary. 87 Perkins Row. Topsfield. 2:00 p.m. to 3:30 p.m. Chandler Hovey Park, Marblehead. For families with children ages 4-12. $10 adults, $8/children (discount for members). Registration required. 978-887-9264. www.massaudubon.org