I went on the "Invented in SF Tour" recently and it was actually quite a surprise. Having lived in S.F. for nearly many years now, I can say that I the tour was very different than your run-of-the-mill tours. It was full of neat surprises I don't think I would have learned on my own (keeping it a bit mysterious so as to not spoil anything). This tour really lends insight into the "can-do" nature of the city's spirit, and Robin is a captivating storyteller. She took time to answer questions and has a great sense of wit and humor about her. The "science-y" twists and little experiments our group did during the tour made it fun and interactive. It definitely was an added bonus and helped to make this tour very entirely unique, just like this city.