CHAIN REACTION AT MIT

Unleash your inner Rube Goldberg at the MIT Museum’s Friday After Thanksgiving (F.A.T.) Chain Reaction, a one-of-a-kind creative engineering feat, 1-4 p.m., Nov. 23. Artist and inventor Arthur Ganson emcees this three-hour extravaganza that you can enjoy as a participant or spectator. Participating teams make fanciful contraptions with materials supplied on site. (They can also register to bring their own.) When all the machines are linked together — with help from Ganson and Massachusetts Institute of Technology students — the mini chain reactions form one mega event with a surprising finale. Adults $15, ages 5-17 $5, students (with ID), seniors, and children under 5 free. Includes free same-day admission to MIT Museum. Rockwell Cage Gymnasium, 120 Vassar St., 617-253-5927, www.web.mit.edu/museum/programs/fat.html