MIT’s Edgerton Center holds free Science on Saturday programs approximately monthly during the school year for elementary, middle, and high school students — as well as their parents and teachers.  Each is a fun, one-hour, interactive presentation beginning at 10AM in MIT’s Kresge Auditorium, 48 Massachusetts Ave. in Cambridge.  Kids under 12 must be accompanied by an adult. Attendees also receive same-day admission to the MIT Museum at half-price. No pre-registration is necessary but seating is limited and first-come, first-seated.  The next program will be April 7: Optics. For more information, contact Dr. Todd H. Rider, Mad Scientist in Residence, at thor@mit.edu.