The Exploratorium is a must-see if you have a child or feel like one. Perfect for the would be scientist or those just curious about the world and how it works.
The million-dollar-view from Coit Tower costs only a fraction of that to see if you get a clear San Francisco day. We did.
Something about Chinatown is a draw for children. Personally, I love the bakeries where you can get dim sum (Chinese appetizers) for less than 50 cents each. Street food at its best.
Best Way To Get Around:
Take at least one trip on the cablecar for the thrill of it but walking is the best way to see all kinds of sights.