We visited this museum after the George Washington House and sorry to say wish we hadn't.
It was like a museum from yesteryear, really boring, dated and faded. Particularly the beginning bit which was about the flora and fauna of the island.
It was not modern or interactive, it was a read the literature on the wall sort of a place.
There were rooms decorated as if they were in old plantation houses which was interesting, but you couldn't go into them, all you could do was look through the window at them, it was really dark in there and I didn't have my glasses so I couldn't see much.
We went to Sunbury Plantation House and the rooms in this House were set out like those at the Museum but you could walk round them and felt like you had gone back in time.
Wouldn't recommend at all, sorry.