(YouTube link)
It's difficult to determine exactly what is going on here, because the small amount of information that came with this video is in Polish. Zenek is the "mascot" of the Lublin University of Technology's superconductor laboratory. Isn't he cute? -via Arbroath
They probably have a superconductor in the zenek, and cool it using liquid nitrogen, then put it on the tracks(magnets) which fixes it in position.
Extremely simplified read the wikipedia article :P
http://en.wikipedia.org/wiki/Meissner_effect