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Trip to the Great Lakes Science Center (2011-04-01)Trip to the Great Lakes Science Center (2011-04-01)Trip to the Great Lakes Science Center (2011-04-01)Trip to the Great Lakes Science Center (2011-04-01)Trip to the Great Lakes Science Center (2011-04-01)Trip to the Great Lakes Science Center (2011-04-01)Trip to the Great Lakes Science Center (2011-04-01)Trip to the Great Lakes Science Center (2011-04-01)Trip to the Great Lakes Science Center (2011-04-01)