I also enjoyed the underground tour. I can't say you actually see all that much but the tour was very entertaining all the same. We had a very funny tour guide. And I would also recommend Pike Street Market. It's so very seattle. If you are from the mid-west like me (Dallas) it doesn't get any more west coast than that. Both are cheap family excursions, easy to get to, and entertaining. We are planning a duck tour. Have heard good things but I haven't been yet myself. Have fun!!