Bring a pen and paper for this one. It IS a puzzle cache.
Certain areas are only open from 10:00 - 5:00. The entire caching tour may take up to an hour. Plan accordingly.
Download the MP3. This is meant to be listened to "in the field". Listen it on a portable device (An MP3 player or burn it to a CD) A combination of a "soundseeing" tour and a puzzle cache.
Update 11/1/10 The historical exhibit in the museum hallway is gone - replaced by little TV monitors - very sad! The 2nd digit of the surfboard is 0.
Go here to get the MP3 audio file.