This is a tubulum, or a PVC pipe instrument. Inspired by the Blue Man Group, playing the instrument) built a “monster”-sized one with a maze-like structure — 82 elbows, 35 elbows and lengths of PVC — and “foam/duct tape
DIY Turn PVC pipes into a playground musical instrument. I wish this had the instructions with it, but I might be able to figure it out. This might even work as a service learning project for the playground
Ceramic Instruments Barry Hall's Globular horns are a very uncommon instrument. The globular horns Barry builds are low pitched, and can be played in a manner similar to a didjeridu. Finger holes can be added to change the pitch.