(Video link)
Someone has created quite an impressive hand-cranked machine that "manipulates small spherical rare earth magnets, slicing one at a time from the end of a long chain, moving it around a bit, then dropping it back to re-connect at the tail end of the chain".
Make sure you don't miss the amazing chain of magnets at the end of the video.
I made this machine for my father-in-law for his 75th birthday: astute viewers equipped with video analysis software and way too much time on their hands might find that the magnet drops 75mm from the tip of the slicer until caught by the lifter, and that the lifter then drops it through a 75mm long aluminum tube.
via Pusha
For anyone interested in buying such magnets, here's the link:
http://www.neatoshop.com/search?q=Buckyballs