- 3D printed whistles? whistle stacks? whistle trees? check.
- laser cut bullroarers? check.
- laser cut bumblers, cross-bumblers, tri-bumblers, multi-bumblers? wax-bumbers? check.
- rubber bands? scissors? string? swivels? sandpaper? glue? wax paper? check.
- safety glasses? check.
Even though this looks like the start of a frivolous summer camp craft project, I expect it will result in some truly amazing sounds by week’s end!