Join a sticky celebration at the Somerville Fluff Festival

The "What the Fluff? Festival" returns to Union Square Sept. 17.

A photo from a previous "What the Fluff? Festival" in Somerville.

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Things are about to get a little sticky in Union Square with the return of the 17th Annual “What the Fluff? Festival.” Slated for Sept. 17 (with a Sept. 18 rate date), this quirky outdoor party celebrates the gooey goodness of the marshmallow topping invented in Somerville in 1917. So unique is the festival that it was mentioned in Lonely Planet as one of the reasons Somerville is among its top 10 “Best in the U.S.” destinations. With this year’s theme of “Fluff at First Sight: Back on Track!,” the festival returns for a’nutter year of musical performances, cooking contests, Fluff-themed games, activities, and Fluff treats of all kinds. Union Square eateries, breweries, cafes, shops, and Fluff fans cook up their own special take in celebration of the Square’s roots.