In 2364, Harry was one of several Enterprise-D children who were kidnapped by the Aldeans in an effort to re-populate their planet. While in captivity Harry was exposed to sculpting for the first time under the instruction of Accolan and Leda, the most prominent artists on Aldea. Though he had never had experience sculpting before, Harry found that he had an innate ability and enjoyed the work tremendously.
Upon his return to the Enterprise-D he told his father that he wanted to continue sculpting. His father agreed but insisted his son still had to learn calculus, a compromise young Harry was willing to live with. (TNG: "When The Bough Breaks")