Aggregation No. 1The Quay Brothers animation in 35mm (and Švankmajer’s “Alice”) throughout Friday, Saturday and Sunday at The Brattle Theatre, 40 Brattle St., Harvard Square. General admission tickets are $11.

The delightful, creepy work of the Quay brothers arrives in a touring package of four films curated by director Christopher Nolan, who contributes his own short film about how these Pennsylvania expat identical twins work. The package includes the broken pencils and lead shavings of “In Absentia” (2000), a porcelain doll’s adventures in “The Comb” (1991) and the nightmarish “Street of Crocodiles” (1986). The brothers’ mentor, Jan Švankmajer, nabs a near-midnight showing of his surreal telling of “Alice’s Adventures in Wonderland.” His “Alice” screens at 11:30 p.m. Saturday. Information on the Quay screenings is here.

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Aggregation No. 2Boston Teen Author Festival from 10 a.m. to 4:30 p.m. Saturday at the Cambridge Main Library, 449 Broadway, Mid-Cambridge. Free.

This fourth annual Boston Teen Author Festival brings in 28 authors for panel talks, giveaways and signings. Discussions address how relationships with other authors influence writers’ lives; the people, places and stories that have influenced the writers and their books; what goes into crafting their magic, culture and worlds; and how to overcome challenges – from the mundane to the magical – in a contemporary setting. Authors include Renée Ahdieh, Becky Albertalli, David Arnold, Amelia Atwater-Rhodes, Anna Banks, Leigh Bardugo, Jessica Brody, Jen Brooks, Sona Charaipotra, Dhonielle Clayton, Zoraida Córdova, Emily Franklin, A.C. Gaughen, Lori Goldstein, Melissa Grey, Stasia Kehoe, Kody Keplinger, Jonathan David Kranz, Kendall Kulper, Trisha Leaver, Mackenzi Lee, Kim Liggett, Kekla Magoon, Sara Raasch, Diana Renn, Cindy L. Rodriguez, Lance Rubin and Adam Silvera. Information is here.

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Aggregation No. 3East Meets West Block Party fundraiser from noon to midnight Saturday at Aeronaut Brewing, 14 Tyler St., near Union Square, Somerville. Free during the day; evening events start at $25.

The Central Square bookstore’s extended family of artists, musicians, technologists and activists are coming together to held raise $15,000 for a year’s worth of events. The event includes free day programs opened to the public and a ticketed evening showcase, with performances including electronic music, beatboxing, spoken word performances, tech talks, a silent auction and even community biology demonstrations. There’s also a Drink Salon on Technology and Ethics, which discusses the role of technology in our everyday lives, and on Saturday includes city councillors Leland Cheung and Nadeem Mazen, council candidate Mariko Davison, Allen Penniman of urban planning collective Street Ops and Matt Cloyd of Code for Boston. Performers include L.A. spoken word artists Beau Sia and Sonja John (pictured); Magnetic North and Taiyo Na, from the New York hip-hop scene; Canada’s Elaquent and Go Yama; Boston’s own DJ Big Bear; and beatboxers Gene Shinozaki, of Boston, and The Beatbox House out of New York. Information is here.

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Aggregation No. 4VivaLatino Cambridge festival from noon to 6 p.m. Saturday at University Park Commons, near Central Square. Free.

This daylong, family-friendly celebration of art, music, futbolito games, salsa dancing, food and drinks is expected to include the “largest salsa lesson in New England” along with five bands, dance performances and awards to be presented for best Hispanic employer, staff, entertainer, sports teams, dance event, retailer and restaurant of the year. Information is here.

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Aggregation No. 5What the Fluff? Marshmallow Festival from 3 to 7 p.m. Saturday in Union Square Plaza, 90 Union Square, Somerville. Free.

Delicious and horrible Marshmallow Fluff was invented in Somerville in 1917, when a local named Archibald Query invented it in his kitchen and sold it door to door. The city’s annual Fluff Festival honors the concoction in most every way imaginable, including music and burlesque, games such as Fluff Lick-Off, Blind Man’s Fluff and the Fluffer Jousting and, of course, lots of Fluff-related foods, only starting with the classic Fluffernutter. There are 13 providers of Fluff-based sweets and eight providing savory foods. More information is here.