Ri, Aneka, and Dad helped to make some adjustments to another set of pipes that would sound as the pendulum-wave apparatus was run. We also met Oak's dad, who is an expert at making an interesting type of Japanese bamboo flute that requires very fine variations in diameter along the resonant cavity.
The physicist also teaches documentary film making at Appalachian State University in Boone. He has a great workshop--dad was very jealous!