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Science and Nature for Kids from About.com
http://kidscience.about.com/
The best children's attractions of Philadelphia and the suburbs.
... traveling and continuing exhibits. The first floor, 6,000-square-foot "KidScience" interactive exhibit introduces kids ages five through eight to the four elements.
http://philadelphia.about.com/od/Family-and-Kids/tp/Philadelphias-Top-10-Kid-Friendly-Attractions.htm

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