What to do in New York City for cheap this weekend: July 9-10

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Jennifer Picht, Things To Do Editor at Time Out New York, shares her picks for free and cheap activities for the weekend.

Bastille Day on 60th Street
This weekend you can celebrate France's Independence Day during Bastille Day on 60th Street. There is a huge street fair complete with French pastries, a wine tasting, can-can dancers and a special performance from the cast of "America in Paris."

60th Street between Lexington Avenue and Fifth Avenue. Sunday at noon.

Multisensory Music Hackathon
If you’re known to drum with your fingers at your desk or tinker with some beats on your laptop, then take your creative game to the next level at this daylong summit, where you can engineer and record original music using state-of-the-art motion and light sensors. After learning how to build sounds with light and motion, you can present your creation at a demo concert at the end of the night. Welcome to the future of music. Visit monthlymusichackaton.org for more information.

Spotify NYC, 45 W. 18th St., Seventh floor. Saturday from noon to 10 p.m. Free with R.S.V.P.

World’s Fair History Tour
Visit the site of the 1964 Queens World’s Fair, which has endured as a cult fascination for more than 50 years. Guides will discuss the glorious promise and heartbreaking downfall of the fair while showing you magnificent sites, like the Unisphere, the Hall of Science, the carousel and the New York State Pavilion (a.k.a. the UFO towers from Men in Black). You can also see the revitalized parks that have sprung from the fair relics, including the Queens Zoo and Museum. Call 718-760-6565 or visit nycgovparks.org for more information.

Flushing Meadows Corona Park, Queens. Sunday from 11 a.m. to 2 p.m.

Ghostbusters Trivia
Before this year’s badass new group of Ghostbusters shows up to save New York City, refresh your memory of the originals at this fan celebration. Compete in five rounds of comprehensive trivia that cover everything from human sacrifices to big marshmallow monsters. Fittingly, trivia teams have a four-person maximum, so make sure you and your fellow ghost-trappin’ fiends can tell the difference between Slimer and Gozer. Call 718-782-3468 or visit videologybarandcinema.com for more information.

Videology, 308 Bedford Ave., Brooklyn. Sunday at 8 p.m., free.