An apparatus useful as an educational device, puzzle or toy of a kind having magnetic interactions between an elongate support and pieces held, or to be held, with or without contact, about said support, wherein a plurality of said pieces collectively form, or can form, a first band of pieces about said support, and another plurality of said pieces form, or can form, a second band of pieces about the support, and wherein at least one piece of each said band has an indicia, said indicia of a piece in one band being able to be indexed to an indicia of a piece of the other band, and wherein at least one of the bands of pieces is able, or will be able, to be rotated about the elongate axis of the support.