I went there in college (went for the physics, stayed for the fun science room) - what I remember most was an exceptionally well-built Chladni plate that you could control.
Here's a video: http://www.youtube.com/watch?v=lRFysSAxWxI
Can't find one of anything at Livingston or Hanford, though.
At Hanford, they have one of Weber's original bar detectors in the visitor's center lobby... So cool.