Penobscot Marine Museum hosts Nor’easter Days, a series of arts and crafts classes for adults, led by locally-known experts. Held on the last Saturday of the month, January through April, the classes run 9 a.m. to 2 p.m. March 31: Sailor Valentines with a Twist. Decorate a frame for a mirror or favorite picture with tiny shells and seeds. Taught by Betty Schopmeyer and Susan Henkel. Registration is $50 per class ($45 members) and includes all materials, with lunch catered by The Good Kettle. The museum is also offering “Overcoat Tours” on the same Saturday dates: January 28, February 25, March 31, and April 28. Collections Manager Cipperly Good will guide visitors through the exhibits in the museum’s historic Merithew House at 2 p.m., and the Seabag Visible Storage Center will be open 1 p.m. to 4 p.m. The tours are free. Visitors are urged to dress warmly, as Merithew House is not heated during the winter.