Registration is now open for the Saturday-morning sessions of Science on Saturday, on December 1 at MIT’s Lincoln Laboratory (244 Wood Street in Lexington).   The topic will be 3D Printing, presented by Lincoln Laboratory’s David Scott. Visit 11 stations to learn how 3D parts are designed and made. All children (5-17 years) must be escorted by an adult, and every adult must be escorted by a child or children.  Children under 5 are not admitted.  Admission is free but each person attending must be registered.  Space is limited. Register online by November 29. Register an adult first, then a child, then others. Adults must bring government photo identification.  See other rules on the registration pages.