The apparatus shown in Figure consists of a durable hard rubber or wood base through which a 6mm hole is drilled. A 6mm diameter graduated 20cm aluminum rod is inserted into this hole. (For smoothness of finish, best results were obtained by using an aluminum rod from a gun cleaning kit). A pair of magnet arrays includes alternating single and double 3/8" cylinder magnets configured so that the magnetic axes also alternate. A magnetic potential energy barrier exists between the two circular magnet arrays, one levitating over the other on an aluminum rod attached to the base. The magnet arrays each contain an N/S alternating unequal arrangement of magnets inside 3Dprinted plastic housings (see downloadable 3D print files at and ) that holds the double and single magnets in the appropriate configuration. The 3D print housings are identical, except the bottom array housing accommodates a ceramic bearing (see full materials list in the supplement).