Conceptual, experimental Uku.
This ukulele is without a sound box, it has a sound board only. When I was kid, we were using plastic sheets laid under writing paper in school. They are common things in Japan, and we were playing with it when we get bored in classrooms. I remember that when you bend it, it makes funny sound, and the acoustic sound increase. Thebasic idea came from it. I wanted to use this amplification system with acoustic instruments as an experiment. I made a small rectangular soundboard, and added a little bit of bending tension.