Marblehead: Robert Simpson of Marblehead, 7, leans over and watches as Kathleen Channell of Portsmouth, NH uses a hand-held X-Ray Flourescence meter to mesure the presence and concentration of elements such as lead or arsenic in a plastic bead necklace Robert likes to wear during his Cub Scout meeting at the Marblehead Community Center on Monday evening. Channell is an environmental health organizer in Boston, and helped a local group called Health Link check toys for toxins in conjunction with State Representative Lori Erhlich and Alliance for a Healthy Tomorrow. Photo by Matt Viglianti/Salem News Monday, December 22, 2008

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