If you have not already checked out the newly renovated Academy of Science, I highly recommend it (www.calacademy.org) The Academy of Science is located by Golden Gate Park in San Francisco. My suggestion would be to arrive early and head right over to the Rainforests of the World exhibit. This exhibit always seemed to have a big line, but it was worth wait. The butterfly garden and fish of the Amazon was a big hit with my kids. The entire Aquarium Level was also a must see. To wrap up the day, I would recommend heading to the Living Roof observation deck. This was a great way to spend the afternoon. You should allow
yourself about 5+ hours to see everything.