If you're looking to connect with Kraków's Jewish heritage, this is a good option. Though the exhibits may not hold much interest for the kids, they are small enough that you can see them quickly, and the museum not only includes a cafe and bookstore, but also a kids corner where they can occupy themselves while you grab some culture, or a coffee.
Admission 15/10zł, family ticket 30zł. Children under 7 free. Seniors 12zł individual, 10zł with a group. Guided tours for groups of over 10: 13.50/8zł per person; individual guided tours: 60zł/30-45mins, 100zł/60mins. Tours available in English, French and Italian.