Do you have some cool looking, but bad 3.5" floppy disks? Swapping the media inside - the cookie - is easier than you might think! If you're careful, it's impossible to tell any work has been done from the outside.

Important note: Don't squash the disk too hard when putting the halves back together, or putting the shutter on. You don't want to pinch the disk media, this will damage it!