I really like the Joselyn Art Museum. It's a great way to spend a Saturday morning (admission is actually free on Saturday AMs) or a rainy afternoon. Admission is very reasonable and there are a variety of good exhibits.
Joselyn Art Museum offers a series called the First Friday Jams during the Fall. They are so much fun to attend and family oriented so it makes for a fun night out. They also offer the Jazz on the Green during the summer.
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