AMY SWEENEY/Staff photo. Andover Townsman Alex Wang, 4, reacts as he looks at tidal pool brought by the New England Aquarium. Kristina Doucette, 14, a teacher assistant, monitors the children as they look. Doucette has been coming to Kaleidoscope kids camp since she was three. This is the 30th year of the camp. 07/13/2010

, AMY SWEENEY/Staff photo. Andover Townsman Alex Wang, 4, reacts as he looks at tidal pool brought by the New England Aquarium. Kristina Doucette, 14, a teacher assistant, monitors the children as they look. Doucette has been coming to Kaleidoscope kids camp since she was three. This is the 30th year of the camp. 07/13/2010

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