Our homeschool group (preschool - high school) went to Fairway Waterfall in Novato for our park day this past week and it was wonderful. Marin Mommies recently blogged about this hike, which is how we ended up there, so for all the details, read Pamela's excellent review (includes a video and links to other family friendly waterfall hikes in Marin).
I had never had anything at Comforts Cafe in San Anselmo except their famous Chinese chicken salad (yes, it lives up to the hype) until recently when I went for a MMO (moms morning out) with friends. I'm not a breakfast lover, but I savored every bite of my eggs benedict, which was perfectly cooked with a rich, buttery hollandaise on an Engish muffin.
I ordered mine with Canadian bacon (ham or bacon or spinach & tomato were the other options). I also enjoyed the fruit (honeydew, pineapple) and home-style potatoes that came with it, though I would have preferred hash browns. $11.50 seemed a bit steep, but it was was a worthy splurge.
We rarely eat out with the children, and when we do, it's usually In-n-Out or Fresh Choice, but the prices are reasonable at Comforts (there were cheaper items than what I got), and there's a kids' menu for lunch, so it seems like it could be a family meal destination if you live nearby or you want to grab a bite before or after heading to west Marin to walk around Lake Lagunitas, hike Samuel P. Taylor State Park, or go to the beaches at Point Reyes.