Registration is now open for the next monthly Saturday-morning session Science on Saturday, on December 6 at MIT’s Lincoln Laboratory (244 Wood Street in Lexington).   Jude Kelley of Lincoln Laboratory will discuss Electricity, Ions, and Chemistry.  Students will see demonstrations of how ions produce wild colors and interesting effects with electricity.  All children must be escorted by an adult, and every adult must be escorted by a child or children.  Admission is free but each person attending must be registered.  Space is limited, so register online soon for either Session 1 (9AM to 10:30AM) or Session 2: 10:45AM to 12:15PM).  Adults much bring government photo identification.  See other rules on the registration pages.