MIT’s Edgerton Center holds free Science on Saturday program about monthly for elementary, middle, and high school students — as well as their parents and teachers.  On November 15, the program will be focused on optics, presented by the Society for Women Engineers.  Kids under 12 must be accompanied by an adult.  The program includes a one-hour presentation at 10AM followed by hands-on activities.  No pre-registration is necessary but seating is limited and first-come, first-seated.  It’s held in MIT’s Kresge Auditorium, 48 Massachusetts Ave. in Cambridge.