Boo at the Zoo takes place this weekend. (Mehgan Murphy/Smithsonian National Zoo) (Mehgan Murphy/Smithsonian's National Zoo/Mehgan Murphy/Smithsonian's National Zoo)

Friday, Oct. 19

Return of Dorothy’s ruby slippers at National Museum of American History: Two years ago, the Smithsonian sent out a simple plea to fans of “The Wizard of Oz”: #KeepThemRuby. Dorothy’s ruby slippers had been on display at the National Museum of American History since 1979 and were one of the museum’s most popular exhibits, but the nearly 80-year-old pair of slippers had seen better days. A Kickstarter campaign was started by the museum and exceeded its $300,000 goal with support from more than 6,000 donors. The money went toward the repair of the leather, sequined and glass-beaded slippers and a new display case. The iconic shoes will return to the permanent exhibit this weekend alongside a temporary exhibition of the Scarecrow’s hat, and the museum will host a variety of “Oz”-themed events, including showings of the 1939 classic movie in 35mm. Noon to 3 p.m. Free, movie showtimes priced separately.

Boo at the Zoo: The annual Halloween event that merges candy and animals is back at the National Zoo. All trick-or-treaters will get a commemorative bag to hold candy from the more than 40 vendors who will be passing out their sweet confections. There will be plenty of entertainment, in addition to the zoo’s normal exhibits, which will be open to guests at this after-hours event. Please note that all guests age 2 and older, including adults, must purchase a ticket. Through Sunday (Saturday’s event is sold out). 5:30 p.m. $30.

Prosciutto tasting at Pitango Gelato — Adams Morgan: You might know this local chain as merely a shop to find fresh, seasonal gelato, but the Adams Morgan location also has been serving Italian-inspired savory cafe sandwiches and bites. It is now joining an exclusive group of prosciutto purveyors with the Consorzio del Prosciutto di Parma. There will be a prosciutto specialist on hand to educate guests about the history and tradition of the Italian cold cut, and, of course, samples will be provided. 5 to 7 p.m. Free.

Saturday, Oct. 20

Kids Euro Festival at various locations: One of D.C.’s greatest family events is organized by countries thousands of miles away. The annual Kids Euro Festival brings the culture of the 28 countries of the European Union to Washington for two weeks of film screenings, story times, art activities, and traditional music and dance performances, at venues that include embassies, the American Film Institute and city libraries. It’s most fun for kids and parents when countries put their own whimsical touches on the event: For example, after a Sunday screening of the Czech animated film “Oddsockeaters,” about creatures who devour stray clothing, children can make their own Oddsockeater at the Textile Museum. Locations and times vary. Most events are free, but some require RSVPs.

Park Snakes at Bestworld Supermarket: On most nights, Park Snakes resembles a punk band crashing the cocktail lounge — smoky melodies and guitars that go clang. But on Saturday night, the D.C. quartet is crashing Bestworld Supermarket, the Mount Pleasant grocery store where the group’s lead singer, Nenet, does her weekly shopping. It isn’t a stunt. When word spread earlier this year that CVS was eyeing Bestworld’s location for a shiny new pharmacy, community leaders vowed to save the supermarket, which has been serving low-income residents in Mount Pleasant for years. Efforts have included everything from petitions to on-site benefit concerts. “So now there’s gonna be a punk show in the produce aisle,” Nenet says. Park Snakes — having played the club circuit, various DIY venues, even the Smithsonian American Art Museum — have plenty to show for it. The group’s debut album, “Silk,” sounds stylish, but even more than that, adaptable. 9 p.m. Sold out but $500 tickets remain.

[Here’s why Park Snakes is playing a punk show in a grocery store]

Chesapeake Oyster & Beer Festival: If you haven’t gotten tired of the food festival circuit in the District yet, check out the second iteration of this showcase of oysters in a parking lot outside Nationals Park (First and N streets SE). More than 20 shuckers are scheduled to be at the event along with thousands of the all-you-care-to-taste bivalves from the Chesapeake Bay, as well as New Jersey, Cape Cod and Canada. An assortment of national and local beers, including Goose Island and Devil’s Backbone, will be pouring alongside a build-your-own-bloody-mary bar. Noon to 4 p.m. $39-$79.

Air & Scare at the Udvar-Hazy Center: Head to the area’s other Air and Space Museum to get an early start on trick-or-treating. The museum promises creepy crafts, spooky science experiments and, of course, the usual candy distribution. This year’s main attraction will be the museum’s virtual experience of the Mars rover, where kids and guests of all ages can see what it would be like to roam the Red Planet. Noon to 5:30 p.m. Free admission, but parking is $15 until 4 p.m.

Soul Strolls at Congressional Cemetery: This Southeast cemetery is the final resting place for over 65,000 individuals such as J. Edgar Hoover and John Philip Sousa. Originally founded in 1807, the burial site is still active and operated by a local church. This annual twilight guided tour begins on Friday, when guests have a chance to learn about some of the other notable names buried on the grounds — expect some surprises along the way with costumed interpreters and vignettes. Each tour runs an hour and departs every 15 minutes. 6 to 10 p.m. Also on Oct. 26 and 27. $12-$60.

Sunday, Oct. 21

J Balvin at EagleBank Arena: Although 2017 was the year of “Despacito,” Luis Fonsi and Daddy Yankee’s Justin Bieber-assisted smash wasn’t the only volley in Latin’s latest crossover moment. There was “Mi Gente,” the irresistible snake-charmer by Colombian reggaeton star J Balvin (which was also boosted by a stateside co-sign by Beyoncé). The song anchored Balvin’s “Vibras,” a very-2018 album that cross-pollinated reggaeton rhythms with salsa, bachata, trap and more, helping it move hips around the globe. And Balvin didn’t stop there: He kept the Latin crossover movement going by featuring on Cardi B’s “I Like It,” a song of the summer whether you speak Spanish or not. 8 p.m. $39.95-$391.95.

[4 shows to see in the D.C. area in the next several days]

Big Thief at 9:30 Club: Personal, soul-baring lyricism has always been an admirable quality in music, and there are few better young voices doing it at the moment than Big Thief vocalist Adrianne Lenker. Her tender and restrained vocals almost clash with the nature of the stories contained in her songs, which deal with trauma and raw, wrenchingly intimate moments. The Brooklyn quartet gives backing to these stories with soft melodies that blend delicately picked acoustic folk rock with driving rock melodies. 7 p.m. $20.

3 Stars Brewing Hopfunk Fest III: The 3 Stars team could have thrown a little party at their Takoma brewery to mark the release of a bourbon barrel-aged strong ale and the rerelease of some of their best recipes, such as the tart That’s My Jam blueberry sour and the fruity, hazy Star Dust double IPA. Instead, they’re spreading the love by hosting a beer festival, inviting friends and collaborators from far and wide. Among the guests pouring new and rare brews: Virginia’s Ocelot, Maryland’s RAR, Indiana’s 18th Street and New York’s Interboro, Barrier and KCBC. General admission tickets include two beers; the VIP passes offer six drink tickets, early admission and a four-pack to take home. 1 to 7 p.m. $10; $50 VIP.

Common Cru wine tasting and ramen class at Toki Underground: This program from D.C.-based sommelier Danya Degen and Toki Underground general manager Olivier Caillabet promises to teach guests how to select and enjoy affordable wines while also learning how to make Toki’s ramen and dumplings (on alternating weeks). Sunday’s class includes a ramen workshop with a flight of three wines. Classes start at 4 p.m. $55.

The Rumpus Room: Halloween Edition at U Street Music Hall: The family dance party returns to the subterranean club for a Halloween-themed celebration. Costumes are encouraged at this daytime affair, which will feature the club’s permanent fixture of a disco ball plus spooky-themed decor for all ages. Drink specials will be available for the adults. 11 a.m. to 2 p.m. $15-$40; infants/crawling children admitted free. No adult admitted without a child; maximum of three kids per adult.

— Hau Chu, Fritz Hahn, Chris Kelly and Chris Richards