You have old floppy drives? Make a cnc!
If you still have some floppy drives around Richard Harris is showing you how to make a small cnc in a ten video series. As you may know in order to make a cnc you need stepper motors. Floppy drives were using stepper motors so combining them with some bolts and the right software you can spend the weekend in a very productive way!
I suggest to subscribe to his channel as his making great stuff!