Wanting to come up with a simple and inexpensive project teachers could use to teach their students some aspect of technology, Instructables user biochemtronics came up with this hand-cranked paper clip machine.
From the creator's comments:
For educators this project is a great way to teach students the physics of mechanical machines including cranks, levers, fulcrum points, rotary and linear motion all while stirring their curiosity and developing their mechanical aptitude.
What he has really done is conceive of an inexpensive platform for building machines that requires some scraps of wood, paperclips, pliers, and a small drill. The result is not only educational but beautiful as well. Ingenious.
[ Thanks Aaron and Ron! ]