The Bay Area Science Festival is coming up, and the good thing is that it spans a few weeks, so you can pick and choose what you want to go to - and when.
It runs from October 24 through November 2. They're still adding events on, but some you need to sign up for, so do it soon if you're interested. The big one is Discovery Days at AT&T Park, where they will have more than 150 exhibits, experiments, games and shows. That's on Saturday, November 2 from 11-4. Cal State East Bay has their own Discovery Days on Saturday, October 26 with more than 50 booths.
You can see the Bay Area Science Festival schedule here.
Some sample events:
-Insects v. robots at the Lawrence Hall of Science (free with admission)
-Cardboard challenge with Kidsworx Creative Workshop (free, Children's Museum of Sonoma County)
-The Moth: The Big Bang (I love this public radio show!) - tickets are $25-45
-San Francisco Rocks walking tour- seismic forces that changed our city ($25/adult, $20/under age 18)
-Hands-on science at the farmer's market (free)