Here is my newest MOC showing Nikola Tesla and one of his machines. In fact this is not Tesla’s machine but magnetic bearing inspired by works of Yoshihito Isogawa, and his playing with non Lego neodymium magnets.
Beware those magnets are not safe for kids, and can be lethal if swallowed. If you swallow two of them and they snap through your internal organs they can cause perforation and serious injuries.
Below is video showing how it works, but if you want to see it in person, join me in Skaerbaek 2017 where this MOC will be presented.