This is a place I used to go myself when I was younger. This place is certainly small but extremely nice to have so close. The location is not very large but it's definitely more educationally oriented than just for keeping the kids busy. The prices are very reasonable and as you can see from there website: http://www.see-sciencecenter.org/index.html , they are always adding new things. Prices are very nominal. Certainly check out if you live around the area.
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