I'm planning a visit to the Zuidersee Museum now that spring is here. It is not one of those big name museums that people come to Holland hoping to see, but I hear great things about the different aspects of art, culture, and history that the museum encompasses. With plenty of things to see for both adults and children, the Zuiderzee Museum is all about the relationship between land and water that is so tied to the country; past, present, and future.

Now when I say museum, it probably isn't the kind of museum you picture in your head. This is a museum + park, which includes traditional Dutch houses. So during the week, for example, the buildings are closed, but you can walk around all you want.
The schedule for visiting the museum varies depending on what you want to do, so consult the website for detailed info. The cost for adults is €13, kids 4 to 12 €7.80, 3 and under free. There are family rates and other deals depending on your situation.

Further details, including how to get there (short train ride from Amsterdam), are also well described, in English, on the website.