Build It Day

Name: Build It Day
Start: 2026-07-21T13:00:00-07:00
End: 2026-07-21T15:00:00-07:00
Location: Castro Valley

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Join us at the Castro Valley Library for Build It Day! Children and their families are invited for an afternoon of Legos, puzzles, and more! Drop in any time during the time frame to complete the activities at your own pace. Library staff…

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Good to know

Is Build It Day free?

Yes, Build It Day is free to attend.

When is Build It Day?

Tue, Jul 21 · 1 PM – 3 PM. Dates and times can change, so confirm on the official event page before you head out.

Where is Build It Day held?

Castro Valley in San Francisco, CA. Tap the location for directions.

What else is happening for kids near San Francisco?

Plenty. See our full list of kids events in San Francisco this week, updated daily with free and paid family activities within about 50 miles.