GROUNDHOG DAY EXTRAVAGANZA. Saturday, Feb. 2, 1 to 4 p.m., Ipswich River Wildlife Sanctuary, 87 Perkins Row, Topsfield. Families with children are invited for ongoing activities, including nature hikes, snow sculptures, a groundhog obstacle course, crafts, refreshments and more. Groundhog celebration and puppet show are set for 2 p.m. in the barn. Dress for weather. $9/adults, $7/children, discounts available for Mass Audubon members. Advance registration required at 978-887-9264.