This is a great science center, which is a wonderful place to take the kids for an afternoon of some fun. They have a fairly new planetarium here, and always have some show going on as well. They also have the famous IMAX which shows different features every few months (but don't do IMAX if you get motion sickness!).
Parking if I remember correctly will cost you a few bucks but the general admission to the science center is free.
Definitely take your family here. It's worth going to at least once, if not more.
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