Are you hanging around the Bay Area this weekend, and you're not sure what to do? Here are some sites to check for happenings:
Red Tricycle has events here.
Ronnie's Awesome List has events for the whole month.
SFKids.org has a calendar here.
SFgate.com has a calendar of Labor Day events.
Kidmatter.com has a nice list of events
Chatterblock has a list here.
Spotivate has a list of hand-picked events (with beautiful photos). You have to sign up in order to see it, though. You can sign up for the weekly San Jose newsletter here, and the San Francisco one here.