Husband-and-wife retailers Rob Prince and Terry Chambers, owners of Prospect Jewelers since 2000, are active ­members of their local community. So much so, in fact, that Chambers has become the go-to Mrs. Claus at neighborhood events for the Prospect Area PlayReaders theater and the Salvation Army. When the Point Center shopping center asked the duo to help reinvent its family-friendly holiday program two years ago, Prince and Chambers imagined a design competition that would captivate their town’s littlest jewelry aficionados: their customers’ children. Out-of-the-box thinking isn’t new for the duo, who until recently lived aboard their boat, the aptly named Family Jewel, on the Ohio River. “We’re officially landlubbers now,” Chambers says, “and I’m really enjoying being an integral part of this little town and getting the younger generation excited about jewelry.”Why