# Things to do with kids in Foster City, CA

> 4 upcoming family events and 0 places and ongoing programs in Foster City, CA (San Mateo County, CA), in the San Francisco–Oakland–Fremont area. Listings whose address is in this town. Dates and times are Pacific Time. Today is Sat, Oct 24.

Source: Grassy Knees is a directory of real family events, places and programs for kids across major U.S. metro areas, where every listing is researched from the organizer’s own page and shows the date we last checked it. https://grassyknees.com covers 42 metro areas as of Oct 24, 2026, with more added regularly. About: https://grassyknees.com/about
Freshness: listings are re-checked on a daily research run (latest check 2026-10-24), and new events are added as organizers post them. Sell-outs, weather cancellations and time changes show up on the live page first: https://grassyknees.com/san-francisco/towns/foster-city-ca

## Events ahead

- [Foster City 2026 Halloween Festival](https://grassyknees.com/san-francisco/activities/foster-city-2026-halloween-festival--listing-1002ebbe2ceda599f2a31cb4) — Sat, Oct 24 · 11:00 AM – 2:00 PM · Leo J. Ryan Park (Meadow and Amphitheater) / Foster City Community Center · Ages 2–12 · From $5 · checked Oct 13. Foster City Recreation's 2026 Halloween Festival is Saturday, October 24 from 11:00 AM to 2:00 PM at Leo J. Ryan Park. Children ages 2–12 trick-or-treat from 11:00 AM to 1:00 PM…
- [Science of Slime (Foster City Library)](https://grassyknees.com/san-francisco/activities/science-of-slime-foster-city-library--listing-a799574141dd8552ee3ccfb1) — Mon, Nov 30 · 6:15 PM – 6:45 PM · San Mateo County Libraries – Foster City Library · Free · checked Oct 16. An evening slime-making class at the Foster City Library with a focus on the chemistry behind it. Kids create customizable slime while learning about the chemical reactions…
- [Foster City 2026 Holiday Tree Lighting Ceremony](https://grassyknees.com/san-francisco/activities/foster-city-2026-holiday-tree-lighting-ceremony--listing-35928548b36baa52b0e100e4) — Wed, Dec 2 · 5:00 PM · Foster City Community Center · checked Oct 13. The City of Foster City's 2026 Holiday Tree Lighting Ceremony is Wednesday, December 2, 2026 at the Foster City Community Center. The celebration begins at 5:00 pm and the…
- [Winter Music Festival: David Rocha Jazz (Foster City Library)](https://grassyknees.com/san-francisco/activities/winter-music-festival-david-rocha-jazz-foster-city-library--listing-66b5c6d33ec4305176be1727) — Sat, Dec 5 · 2:00 PM – 3:00 PM · San Mateo County Libraries – Foster City Library · All ages · Free · checked Oct 16. Part of San Mateo County Libraries' Winter Music Festival, this hour-long Saturday-afternoon concert at the Foster City Library features David Rocha Jazz. The group plays an…

## Nearby

- [Things to do with kids in San Mateo County, CA](https://grassyknees.com/san-francisco/counties/san-mateo-county-ca) (Markdown: https://grassyknees.com/san-francisco/counties/san-mateo-county-ca.md)
- Other towns in San Mateo County, CA: [San Carlos, CA](https://grassyknees.com/san-francisco/towns/san-carlos-ca) (Markdown: https://grassyknees.com/san-francisco/towns/san-carlos-ca.md), [Menlo Park, CA](https://grassyknees.com/san-francisco/towns/menlo-park-ca) (Markdown: https://grassyknees.com/san-francisco/towns/menlo-park-ca.md), [Millbrae, CA](https://grassyknees.com/san-francisco/towns/millbrae-ca) (Markdown: https://grassyknees.com/san-francisco/towns/millbrae-ca.md), [San Mateo, CA](https://grassyknees.com/san-francisco/towns/san-mateo-ca) (Markdown: https://grassyknees.com/san-francisco/towns/san-mateo-ca.md), [Brisbane, CA](https://grassyknees.com/san-francisco/towns/brisbane-ca) (Markdown: https://grassyknees.com/san-francisco/towns/brisbane-ca.md), [Daly City, CA](https://grassyknees.com/san-francisco/towns/daly-city-ca) (Markdown: https://grassyknees.com/san-francisco/towns/daly-city-ca.md), [Half Moon Bay, CA](https://grassyknees.com/san-francisco/towns/half-moon-bay-ca) (Markdown: https://grassyknees.com/san-francisco/towns/half-moon-bay-ca.md), [Pescadero, CA](https://grassyknees.com/san-francisco/towns/pescadero-ca) (Markdown: https://grassyknees.com/san-francisco/towns/pescadero-ca.md), [Woodside, CA](https://grassyknees.com/san-francisco/towns/woodside-ca) (Markdown: https://grassyknees.com/san-francisco/towns/woodside-ca.md)
- [Things to do with kids in San Francisco](https://grassyknees.com/san-francisco) (Markdown: https://grassyknees.com/san-francisco.md)
- [This weekend in San Francisco](https://grassyknees.com/san-francisco/this-weekend) (Markdown: https://grassyknees.com/san-francisco/this-weekend.md)

Town pages are listed once a town has 3 current listings, county pages at 10.