For a long time, and way back when, I kept a ‘research’ old microwave out in the garage. The best was loosely fluffed up coarse bronze wool. Not steel wool. It’s a good time, although I suspect that x-rays may be produced. So be mindful of that.
Wow a ‘research’microwave at home!!
NICE!!
Typically it was the break room/lab with a select group of ‘researchers’.
My brother had the largest Nexie tube ever. That was fun.
NB: A burnt out filament bulb puts out a nice display but the glass cannot take the heat for too long.
Steel wool spinning is fun too!
No microwave required!
Stuff fine steel wool contained in an old whisk on a string.
Light it and spin it fast.
Safety glasses may be a good idea.