Maryland Science Center

The Maryland Science Center, located in Baltimore's Inner Harbor, opened to the public in 1976. It includes three levels of exhibits, a planetarium, and an observatory. In 1987, an IMAX theater was added. In 2004, a large addition to the property was opened, and the modernized hands-on exhibits now include more than two dozen dinosaur skeletons. Subjects that the center displays include physical science, space, Earth science, the human body, and blue crabs that are native to the Chesapeake Bay.
Maryland Science Center won a 2006 Best of Baltimore award for "Best Place to Take Kids." In 2008 the Maryland Science Center was named one of the “10-Best Science Centers for Families” by Parent's magazine.

Retired Machines:

Retired 1: 1) "Explore Your World" with an image of a globe, 2) "Baltimore Orioles" with the Orioles Baseball Team logo, 3) "Baltimore...Charm City" with an image of a Crab, 4) Face of an alien.
Retired 2: Each has Einstein and the equation "E=MC2", 1) the Earth, Moon, spaceship, and satellite, 2) Albert Einstein and the equation "E=MC2", 3) a Brontosaurus, 4) a Crab and the words "Science Center.
Retired 3: 1) 'Our Place in Space', Man looking through Telescope, 2) 'Chesapeake Bay Blue Crab', Crab, 3) 'The Big Year', Head showing brain, 4) 'The Universe Inside Us', Man
Retired 4: 1) Hubble Space Telescope', Image of telescope, 2) 'Orioles', Oriel holding a bat, 3) 'Astrodon', Dinosaurs, 4) 'I Love Science', Atoms, genes

1/24/26: According to an employee, the Science Center logo changed in June 2025 and the machines were taken away.
However, you can still purchase a booklet of 8 old pennies at the gift shop for $5. It's currently a red American flag booklet and contains the pennies from retired machines 3 and 4.
The gift shop is located to the left as you enter the building and the booklets are near the cash register. -PAB
7/22/26 - Gift shop employee says there are no penny machines and no pennies to buy.