On Saturday, September 19, Union Square in Somerville filled with the kind of local celebration that asks people to slow down and join in. The 21st annual What the Fluff? Festival brought neighbors, artists, vendors, musicians and families together around a very local invention: Marshmallow Fluff. The free, all-ages event gave the neighborhood an afternoon of games, food, music and the simple pleasure of recognizing a place’s own history.
This year’s theme, “Legally Fluff: A Toast to Union Square,” marked the festival’s 21st year. The City of Somerville’s event announcement described a larger footprint designed to improve pedestrian circulation, keep emergency access clear and make the experience easier to share. The changes were practical, but the purpose stayed familiar. People came to celebrate the sweet spread, then stayed for the people and places that give Union Square its character.
The festival’s official information listed more than 100 vendors, limited-edition merchandise and activities that mixed food with public art and play. Visitors could browse local work, try Fluff-inspired treats and take part in competitions on the Shenanigans Stage. Musical performances filled a second stage, while pop-ups and interactive activities gave children and adults reasons to move through the square instead of standing at the edge of the event.
Boston 25 News reported ahead of the festival that organizers expected about 30,000 people and planned Fluff-themed games, musical performances and dishes from vendors. That preview made clear why the event has lasted: it is specific enough to feel unmistakably Somerville, while open enough for someone who has never heard the neighborhood’s invention story to walk in and understand the welcome.
The festival’s roots reach back to Archibald Query, who developed Marshmallow Fluff in Somerville in the early twentieth century. The anniversary gave organizers a reason to tell that story again, but the day was not a museum exercise. Local artists designed new work, businesses prepared fresh menu ideas and volunteers helped turn streets and public spaces into a temporary neighborhood commons.
A community festival can be a small civic lesson. A child sees a city close streets so people can walk safely. A family discovers a shop or artist they had not met before. A musician shares a stage with a food vendor and a public agency. None of those encounters needs to become a formal partnership to matter. They are the ordinary connections that make a place feel more familiar the next time someone passes through.
The city also highlighted an expanded layout intended to support a growing crowd while maintaining access and safety. Organizers directed people toward walking, biking and public transit, including a free bike valet. Those details kept the event grounded in the neighborhood rather than treating it as a spectacle dropped into town for one afternoon.
What the Fluff? is playful by design, but its staying power comes from something steadier. For 21 years, local businesses, artists, volunteers and neighbors have kept finding ways to make the same celebration feel new. This year, Union Square offered another reminder that a community does not need a grand reason to gather. Sometimes a shared story, a few good games and a little marshmallow are enough to open the door.
The best community traditions leave space for invention. One year, a new vendor brings a new recipe; another year, a student group adds a game or a local artist changes the visual language. The festival keeps its recognizable center while allowing each generation to add something of its own. That is how a neighborhood celebration becomes more than an anniversary: it becomes a habit of making room.
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