simple device to play with -

ingredients -
3.5" floppy disk.
nail varnish(preferably high in flammable content)
strike anywhere matches

open the disk carefully and cut the disk part nicely so most is gone, and place back inside to produce convincing view of disk. (make sure when slider opened you can still see disk.)

shave off all the heads of the matches, all the powder and bits, and then mix with nail varnish.

make sure nice and lumpy with match parts.

smother inside of disk completely.
stick back together.

place in drive.