The Maryland Science Center in Baltimore's Inner Harbor is a family favorite even when they are not hosting a Harry Potter event or a sleepover. The Maryland Science Center is part of the Association of Science and Technology Centers, which means membership at the Maryland Science Center will allow you free admission into hundreds of science museums across the country.
The Maryland Science Center hosts a surprising number of sleepovers at a price significantly cheaper than many other museum sleepovers. When a friend alerted us there was to be a Wizard Academy sleepover, we bought tickets immediately. The best part about it was that the sleepover was open to kids 5 and up, which means Anne could join us for her first museum sleepover ever. Another bonus was that a family that includes close friends of both Anne and Clare were also at the event. The girls had so much fun experiencing the museum and the special events with their friends.
Perhaps my favorite part of the sleepover was the planetarium show. I did not know how they were going to make a planetarium show specific to Harry Potter. Boy, was I ever surprised. Most of the members of the Black family are named after stars (which, of course, received their names from mythology). Some examples: Bellatrix, Sirius (which is known as the Dog Star--a significant tie to Sirius's animagus), and Regulus. Merope Riddle is also named for a star. Other characters are named for constellations or even galaxies, such as Draco, Cygnus, and Andromeda.
Following the planetarium show, we went to Potions class in the SciLab. I was amazed by how orderly this proceeded. We proceeded from station to station following the detailed directions of how many drops of creatively named solutions we should add to our mixtures.
I fully recommend a sleepover at the Maryland Science Center.