One basic observation of physics is that a moving charged particle produces a magnetic field around itself.Thus, a current of moving charged particles produces a magnetic field around the current. This feature of electromagnetism, which is the combined study of electric and magnetic effects, came as a surprise to the people who discovered it. Surprise or not, this feature has become enormously important in everyday life because it is the basis of countless electromagnetic devices. For example, a magnetic field is produced in maglev trains and other devices used to lift heavy loads.
The video below shows a magnet repelling another one to cause magnetic levitation. (You do not have to use headphones for this video).