A styrofoam model of a train contains a piece of a type-2 superconducting material. Liquid nitrogen is poured into the train as it is held a small distance above a track which is permanently magnetic, cooling the superconductor and trapping the magnetic flux that is present in it. The track is made from three rows of permanent, high-strength magnets which, in cross-section, are oriented N-S-N. Once cooled, the train will levitate and remain aligned with the track.

No model train car, just a track of the magnets in the appropriate orientation. Cool the superconductor in liquid nitrogen until it stops boiling. Carefully place it over the track. You'll feel the magnetic force as you move it around. With patience, you should get it to be roughly parallel to the track as it levitates.

B3, I2

PIRA DCS 5G50.XX