Nature Time at Greenwell
Nature Time, a program at Greenwell State Park for children to enjoy nature through games, crafts and exploration, will continue through Sept. 30. It meets Tuesdays, 10 - 11:30 a.m. Call 301-373-9775 or visit www.greenwellfoundation. org for more information.

River Concert Friday
The Chesapeake Orchestra and guest jazz vocalist Hilary Kole will perform a patriotic concert Friday at St. Mary’s College. The performance will include the 1812 Overture (complete with fireworks show), Sousa marches, and Joplin ragtime tunes. Kole will perform classic American songs by Gershwin, Kern, Porter and others The grounds open at 5 p.m. with the free concert at 7 p.m. Call 240-895-2024 for more information.

‘‘Seussical” in St. Mary’s County
The Broadway musical ‘‘Seussical” will be this year’s production of the St. Mary’s County Recreation and Parks Dept. Summerstock. Based on the works of Dr. Seuss, it features a score by Stephen Flaherty and Lynn Ahrens. It will be performed at Great Mills High School July 18-20 and 24-27. Thursday-Saturday evenings are at 7 p.m., with Sundays at 5 p.m., and cost $14 for ages 11-adult, $12 for senior citizens and $4 for children. A Saturday, July 26 matinee performance at 1 p.m. is priced at $10, $8 and $4, respectively. Call 301-475-4200 ext. 1800 for more information.

Freedom Fest in St. Mary’s
Freedom Fest in Leonardtown will be Saturday at the county fair grounds, featuring an evening of family fun starting at 5 p.m. and culminating with a fireworks display. It is part of a holiday celebration that includes a free concert by the Mid-Atlantic National Guard Band July 2 at the Leonardtown Square, a ‘‘Jazzy 4th” River concert at St. Mary’s College, and the annual Independence Concert at Sotterley Plantation July 6. Call 301-475-4200 for more information.

Independence Day at Sotterley
The Independence Day Celebration Concert at Historic Sotterley will be Sunday, 1-4 p.m. on the front lawn of the mansion. Featured will be a concert by the Chesapeake Orchestra Brass Quintet. Cost is $10 per vehicle. Free for Sotterley members and all U.S. military with valid ID. Call 301-373-2280 for more information.

Sharkfest returns
‘‘Sharkfest” will return to the Calvert Marine Museum July 12, 10 a.m. - 4:30 p.m. Visitors will be able to touch the rough hide of a shark in the shark touch tank, have their pictures taken in the jaws of a Giant Megalodon Shark skeleton, and learn about the history of the world in the museum’s new paleontology hall. For more information, visit www.calvertmarinemuseum.com.

Greenwell yard sale
The Greenwell Foundation yard sale will be July 19, 8 a.m. - 2 p.m. at Greenwell State Park in Hollywood. Rain date is July 26. Vendors may reserve spaces at $10 per space ($20 per space with six-foot table). For more information, contact David Bruton at 301-373-9775.

‘‘Maximum Ride” Discussion
The Calvert County Library in Prince Frederick will hold a book discussion for teens of James Patterson’s ‘‘Maximum Ride: The Angel Experiment” July 24, 7 - 8:30 p.m. The first seven teens to sign up will receive a free copy of the book. Call 410-535-0291 for more information.