"Print/3D," an Exhibition at Material Connexion, Opens "People are waking up to the fact that this is not pie-in-the-sky technology," said Susan Towers, the organizer of "Print/3D," a show of objects as assorted as a lacy chair, a prosthetic limb and a necklace of big white whistles. Sponsored by the materials resource company Material Connexion, of which Ms. Towers is vice president of marketing and communications, "Print/3D" showcases "additive manufacturing," or making things not by drilling or carving away bits but by building up layers. Computer-driven components in this process move back and forth like a printer head, their laser beams fusing plastic, nylon or ceramic powder into intricate forms. Some objects, like the Bloom lamp, pictured, designed by Patrick Jouin for .MGX of Belgium, even have movable parts. The exhibition demonstrates how far 3-D printing has evolved from creating industrial design prototypes. Now machines are geared to hobbyists. "I was trying my darnedest to get 3-D cookies made," Ms. Towers said. Through May 11 at Material Connexion, 60 Madison Avenue (27th Street). Information: (212) 842-2050 or materialconnexion.com.