We have a great children's museum here San Diego. We like it so much, we got a national membership so we could visit their sister museums everywhere we travel within the country. The one in San Francisco is smaller but also very nice. Nea is finally in an age that she can start playing together with her brother. Even though it often ended into some dispute which required mommy's arbitration. But I still love looking at them playing together (happily), no matter it lasted just one minute or five minutes.