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In this May 1, 2014 photo, Mel Crooks kneels by a selection of his creations built with the toy he launched, Delta Flex Domes and Spheres, a set of 1-by-8-inch bendable strips pieced together with brass fasteners, to teach about shapes, at his home in Rockford, Ill. (AP Photo/Rockford Register Star, Max Gersh)  MANDATORY CREDIT

In this May 1, 2014 photo, Mel Crooks kneels by a selection of his creations built with the toy he launched, Delta Flex Domes and Spheres, a set of 1-by-8-inch bendable strips pieced together with brass fasteners, to teach about shapes, at his home in Rockford, Ill. (AP Photo/Rockford Register Star, Max Gersh) MANDATORY CREDIT

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