School-Day Field Trips

We host school-day field trips at our workshop sites year-round. All field trips include: 

  • One hour of guided hands-on investigations aligned with NGSS science standards -- activities include cracking shale rock to find real fossils, building electromagnets, assembling our grey whale skeleton like a puzzle, dissecting squid, constructing motor toys, and much more. 

  • One half hour of unstructured, free exploration time to discover our exhibits, meet our animals, and explore our expansive collection of bones, instruments, magnets, insects, rocks, microscopes, and more.


After-school Programs

After the school-day, we host local community groups for after-school programs.  

Our after-school programs give students the chance to visit more often than field trips, and practice their skills by working on longer projects. These programs are not constrained by school curriculum, and can be designed by students' own interests. 

Activities in our after-school programs have included working with wood to build home garden planters or homemade scooters, exploring dry ice, making DIY lava lamps and pinball machines, building scribbling wobble-bots, and more.



Drop-in! for Free!

Want to come visit, build and explore -- after school or on the weekend? We would love to have you, and have several (free!) drop-in programs for you to come and participate. During these programs, we open our doors to the community, where scientists of all ages can explore our space at no cost.


Tinker Times


  • Excelsior Site: Every Monday after school (except holidays),

3:00 to 5:00pm 


  • Mission Site: Every Wednesday after school (except holidays),

3:00 to 5:00pm


Second Saturday at Mission Site


  • Every 2nd Saturday of each month of the school year

10am - 3pm


Third Saturday at Excelsior Site


  • Every 3rd Saturday of each month of the school year,

10am - 3pm


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Workshop Locations:

Mission Site  map

3750 18th St,

San Francisco, CA 94114

(415) 621-1240

Excelsior Site map

4458 Mission St,

San Francisco, CA 94112

(415) 594-9165