Registration is now open for the Saturday-morning session of Science on Saturday, on October 19 at 10AM at MIT’s Lincoln Laboratory (244 Wood Street in Lexington).  The topic will be The Science and Magic of Optics!, presented by Lincoln Laboratory’s Recent College Graduates Employee Resource Group. See laser light bend and bounce, learn how different colors combine, watch flat images pop up in 3D, reveal hidden messages with light, and visit demonstration booths. 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 October 18 (October 7 for non-U.S. citizens). Register an adult first, then a child, then others. Adults must bring government photo identification.  See other rules on the registration pages.