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  • Union Square Somerville, MA, 02143 United States (map)

RAIN DATE: 9/24, 3-7PM


“What the Fluff? A Tribute to Union Square Invention” is a zany and fun-filled festival that celebrates the invention of Fluff by Archibald Query in Somerville’s Union Square.  This year’s theme of “FluffCentennial: Inspiring the Next Century of Union Square Invention” highlights the 100th anniversary and the fact that invention is still alive and thriving in Union Square today.

The 12th anniversary of this madcap festival will take place on Sat., Sept. 23rd, 2017 (rain date, 9/24) and will celebrate the invention of marshmallow Fluff with fun and zany activities for everyone to enjoy! Younger children can play interactive games at Knucklebones; fan favorites like Fluff bowling and pin the F on the Fluff boy are at the Midway Games Area; and all are welcome to ride on the Roaming Railroad train. The Shenanigans Stage is the place for hilarious antics, with sticky activities like Fluff Jousting, Fluff Musical Chairs, and this year’s new addition of the Fluff Costume Contest! Another special addition this year in honor of our FluffCentennial theme is Invention Alley where the Somerville High Robotics Team and Artisans Asylum are teaming up to bring great activities like laser printing, the 3Doodler pen, vinyl cut designs, robotics and more.

Come hungry and ready to shop, because over 40 local vendors will be selling both sweet and savory Fluff-inspired dishes, as well as a variety of Fluff-themed crafts. Where else can you try Fluff-inspired creations at a nearby bar or restaurant?

In between the sticky-sweet games, funky crafts, and fabulous fluff creations, enjoy live music and entertainment on the Main Stage. This year’s performances include Squeezebox Stompers, Jan Marie & the Mean Reds, Ten Tumbao and of course, no self-respecting Fluff Festival could take place without our beloved Flufferettes entertaining us with a few sensational burlesque performances, and Dan Dahari from MassMouth will be our emcee. So make sure you bring your dancing shoes.

Submit a Fluffy recipe to our Cooking Contest and your culinary creativity will be judged by a luminary lineup of FluffCentennial judges: Anthony Brooks from WBUR, Rachel Leah Blumenthal from EaterBoston, Andy Husbands from The Smoke Shop and Lisa Hughes from WBZ TV.  Test your culinary genius and sink deep into the sugary fun by creating a marshmallowy concoction for the cook-off!  Check out to sign up; entries will be accepted through Monday, September 19.

Our endlessly entertaining “What the Fluff?” Festival couldn’t happen without the support and generosity of our sponsors. We are so grateful to our Angel Sponsor, Allstate Insurance and our Media Sponsor, WBUR whose support will assure the success of this year’s Festival.  Our Crowdsourcer Sponsors, Union Square Associates (US2) and Bow Market are working to create new hubs of invention in Union Square, and our Supporter Sponsors, Cambridge Realty Group, Naveo Credit Union and East Boston Savings Bank support our residents and businesses in the Square.


  • Main Stage: Musical performances by Squeezebox Stompers, Jan Marie & the Mean Reds, Ten Tumbao with special theatrical presentation by the Flufferettes as interpreted by Rogue Burlesque.
  • Cooking Contest: Whip up an original recipe with Fluff or present your best interpretation of a classic. Check out to sign up; entries will be accepted through Monday, September 18.
  • Shenanigans Stage: All the big, messy Fluff games have their own stage, overseen by our Archibald Query, with games including Fluff Lick-Off, Blind Man's Fluff, Fluff Musical Chairs, Fluff Hair Dos, Fluff Jousting and Costume Contest.
  • Fluff Games for All Ages: Fluff bowling, Fluff constructions, Fluff Ring Toss and the game of culinary roulette we call Fluff Fear Factor. Win prizes! All Fluff Midway Games are free.
  • Invention Alley: Artisans Asylum and The Somerville High School Robotics Team together with 3 Doodler, Black Cat Labs and Invention Land will offer inventive activities, including robotics, the 3Doodler pen, vinyl cut designs, laser etching, and more…
  • Vendors: Buy Fluff treats and Fluff-inspired items from whoopie pies to Fluffernutters.  
Earlier Event: September 12
Somerville Homeless Coalition Golf Tournament
Later Event: September 24
Ride For Food: Ride bikes, Fight hunger