What the Fluff? A Tribute to Innovation is a madcap festival honoring the invention of Marshmallow Fluff in Union Square. This festival celebrates Somerville’s proud tradition of innovation with live music, fluffalicious feasts, games, zany happenings, and much more. NOTE: This is an hour away from the Zandy Castle but would make a fun day trip!

Fluff enthusiasts from all over flock to Union Square to delight in a sticky soiree that encourages festival-goers of all ages, socioeconomic status, and cultural backgrounds to come together to celebrate their community pride while experiencing and learning about Somerville’s values of diversity through the unique cultural expressions of local businesses’ offerings.