Heads Will Roll
thingiverse
Automated Movement for a Magnetic Ball is Achievable Right Now. You can see the movement in action on this video: https://youtu.be/qNXOzBjHFEc Attaching a Magnet to Keep it in Place while Moving, However, Still Requires More Research and Experimentation. Getting Started is Easy. Click here for complete instructions: http://www.instructables.com/id/Heads-Will-Roll/
Download Model from thingiverse
With this file you will be able to print Heads Will Roll with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Heads Will Roll.