Instruments Made by Adults and/or Individuals
You Tube Video
This ensemble has been together for 30 years. There are 9 of them: musicians/inventors/comedians!
All the members of Zic Zazou are originally from Amiens, France.
They give concerts periodically.
Chris's Upright Cardboard Bass (YouTube Video)
Beer Bottle Flute by Virginia Abernathy (YouTube Video)
Vegetable Instruments Made by a Japanese Music Teacher (YouTube)
(See many instruments at this link.)