Feather fan. Not the handheld kind, the kind attached to a motor powered by a USB connection.
Bristlebots! With feathers, of course, and those used toothbrush heads I should admit I am never going to mail back to the manufacturer for recycling.
Repair the original mask.
Make the original mask useable by itself again (needs a strap to go around my head), rather than only useable by attaching it to the headpiece.
Brackets for hanging framed pictures from the bookshelves.
– use the metal from ex-fluorescent fixtures