Aggregation No. 1Reina del Cid at Toad at 9 p.m. Friday at Toad, 1912 Massachusetts Ave., Porter Square. Free.

Pop-rock singer-songwriter Reina del Cid gets compared to artists such as Regina Spektor and Ingrid Michaelson, which are pretty good points of reference – but this Minneapolis prodigy can do those references at least one smarter: You could also say her lyrics bring out a certain Virginia Woolf or Sylvia Plath quality. Her melodies are sweet, though, and you’re going to love her in the intimate setting of this swinging Porter Square watering hole-in-the-wall, where she and her band will stop by while touring to promote the release of new album “The Cooling.”

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Aggregation No. 2“Fare Thee Well” Grateful Dead simulcast at 7 p.m. Friday, Saturday and Sunday at The Sinclair, 52 Church St., Harvard Square. Admission is $5 for one night or or $10 for a three-day pass.

The Grateful Dead (original members Mickey Hart, Bill Kreutzmann, Phil Lesh and Bob Weir joined by Phish’s Trey Anastasio, as well as Jeff Chimenti and Bruce Hornsby) says it’s performing five final shows this summer, with July 5 being the final performance ever. But that’s in Chicago, so The Sinclair is doing a high-definition simulcast for the final three days of those shows, with each simulcast starting at 7 p.m. The drinks and food are probably better at The Sinclair. Information is here.

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Aggregation No. 3Free Fourth of July kids events at 9:30 a.m. Saturday, throughout Cambridge. Free.

Kids age 4 to 12 can have an extra fun Fourth, thanks to the city’s Department of Human Services Recreation Division. Activities include races, doll carriage and bike parades, and all participants in the races get prizes, while all participants in the doll and bike parade get Cambridge Recreation T-shirts. Locations include Donnelly Field in East Cambridge, Glacken Field in West Cambridge and Hoyt Field in the Riverside neighborhood. Information is here.

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Aggregation No. 4Free comedy all day Saturday at ImprovBoston, 40 Prospect St., Central Square.

The entire roster of Saturday shows is free for the Fourth of July at this nonprofit comedy arts organization, including the family-friendly comedy “Family Show” at 4 p.m. and “All-Access Improv,” at 6 p.m.; the completely improvised “Mainstage” at 8 p.m.; and the Independence Day-themed sketch revue “Comedy, America!” at 10 p.m. Also on the ticket: “Before Bed: Fairy Tales for the Hardly Awake” at 7 p.m.; “Battle Royale” at 9 p.m.; “The Draw” at 11 p.m. and “LaughterRisk*,” in which comics are challenged to push their comfort zones, at 11:30 p.m. Free tickets may be reserved online in advance or at the door. Information is here.

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Aggregation No. 5Summer Boston Celtic Music Fest from 1 to 5 p.m. (for free) or 7 to 9 p.m. (for $10 to $20 admission) at Passim, 47 Palmer St., Harvard Square.

Local Celtic music is the draw at this warm-weather version of the annual Boston’s Celtic Music Fest (held each January), starting with a Scottish session with Elizabeth and Ben Anderson from 1 to 3 p.m. and an Irish session with Natalya Kay and Dan Accardi from 3 to 5 p.m. open to any and all participants – who may want to bring along an instrument and contribute a song, or dance along to the music. The evening concert (running from 7 to 9 p.m., it leaves plenty of time to go see fireworks) features guitarist Flynn Cohen; Joey Abarta, Danny Noveck and Lindsay Straw; and the Ceol Corvus trio, which plays on a somewhat unlikely but pleasing combination of instruments: Emily Peterson plays concertina and whistle; Steve Levy plays mandolin, banjo and bouzouki; and Sean Smith plays guitar, bouzouki and bodhran). The recently opened Club Passim kitchen will add to the festivities. Information is here.