For more than 20 years, on the Friday After Thanksgiving, the MIT Museum has hosted a hugely collaborative Chain Reaction in which simple or complex contraptions built by participating teams are joined into one massive Rube-Goldberg-esque chain reaction viewed by over 1500 attendees.  (See video from 2017.)  This year, the very last F.A.T. Chain Reaction will be held on November 29, 1-4PM.  The public can view contraptions, talk with teams 1PM-3PM, and engage in related activities.  The chain reaction will start at 3:30PM.  Buy tickets online by November 28 or in person on November 29 at the MIT Museum (starting at 10AM) or Rockwell Cage (120 Vassar Street, Cambridge).  There’s still time to register a team to participate by building a link in the chain (teams arrive for check-in 11:30AM to 1PM).