My family just spent a few days with some friends in Sonoma County. We visited wineries, of course. Also a couple of parks: Armstrong Redwoods State Reserve near Guerneville and Howarth Park in Santa Rosa. You can see some photos in this Flickr set. Armstrong was especially nice--it's very cool among the giant redwoods, and the walk is easy enough for even little kids. Howarth Park has pony rides, a carousel, a train, and a killer playground. Also paddle boats, but we didn't try those out this time.
We stayed in the town of Windsor, which I discovered has a nice little yarn store called A Good Yarn, as well as a bead store, a scrapbooking store (which was, alas, going out of business), a children's bookstore, and a toy store. There is also a really great candy store called Powell's Sweet Shoppe, which has every imaginable candy, including, of course, my beloved Curly Wurly.