The City Hall is pretty gorgeous, You could visit there. I wish y'all could go to the Oakland Temple, it's divine. There is this amazing concert in SF on Sunday at 7 http://lambofgodeaster.com/
It is a huge opportunity that you don't want to miss.
Ghiradelli Square is cool, but not really; just to eat ice cream, Pier 49 is just a mall, All are cool but really is just directed to tourists! SO money.... Guess I don't have to Get you guys anything from SF, Samuel can just get it himself... I wish I could send stuff home with you, but oh well;)