We are planning a trip to SF from the UK in August with our 4 year old son. Can anyone recommend anything "out of the ordinary" which they think a four year old might enjoy? Also, what do those in the known consider to be the best hotel to stay at with children? And what about eating out? Anywhere to particuarly recommend? We are planning to have 3 full days here before moving on. Is this enough? Many thanks for any advice.