The house at 106 Bromfield Road in Somerville is an unassuming structure, but more than 100 years ago, the man who lived here changed the way we see peanut butter. This was where Archibald Query made his first batches of marshmallow fluff, which he sold door-to-door before licensing the recipe to a pair of local candy manufacturers. By 1920, the sweet, gooey stuff was being successfully marketed as Toot Sweet Marshmallow Fluff, and the rest was stick-to-the-roof-of-your-mouth history.

This Saturday, Somerville celebrates fluff, the sugary substance that gave jelly a run for its money as peanut butter’s best friend, at the Eighth Annual “What the Fluff?” Festival (you can follow the Festival’s frequent Facebook updates here). The party gets started at 3pm, and if the weather doesn’t cooperate, we’ll try again on Sunday. There’s live music, a cooking contest, something called the FluffaTron3000 (your guess is as good as mine), and the crowning of the Pharaoh of Fluff. For those over 21, Somerville’s own Pretty Things Brewery is once again teaming up with the festival to offer a special fluff-topped brew at Precinct, and for little kids, there’s a bounce house, an inflatable slide, and other family-friendly games behind the Independent. This event is always a blast, as you can see from last year’s photos.

Come on down to Union Square this Saturday and see what all the fluff is about!