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What the Fluff? Festival! Legally Fluff: A Toast to Union Square
September 19, 2026 1:00 pm - 5:00 pm Somerville Ave between Church St and Union Sq · Somerville, MA
- Great for Families
- Great for Foodies
- Great for Arts & Culture
The What the Fluff? Festival! Legally Fluff: A Toast to Union Square takes place on September 19, 2026, along Somerville Avenue in Somerville, MA. This unique street festival celebrates the 1917 invention of Marshmallow Fluff by Archibald Query and the ongoing spirit of innovation in Union Square.
What to expect
- •Wacky marshmallow-themed activities and entertainment.
- •A celebration of local history and the 1917 invention of Fluff.
- •A one-of-a-kind street festival atmosphere in historic Union Square.
- •Festivities located on Somerville Avenue between Church Street and Union Square.
Who it's for
- Families with kids
- Local foodies
- Arts and culture enthusiasts
- Fans of quirky local history
Good to know
When and where is the What the Fluff? Festival?
The festival is held on September 19, 2026, from 1:00 pm to 5:00 pm on Somerville Avenue between Church Street and Union Square in Somerville, MA.
What is the history behind the festival?
The event honors Archibald Query, who invented Marshmallow Fluff in Somerville in 1917, and celebrates the innovative spirit of the Union Square area.
What kind of activities are featured?
Attendees can expect wacky marshmallow-themed fun and a street festival environment that highlights local innovation and culture.