Abstract: An ornamental or amusement device has the geometric configuration of two inter-penetrating tetrahedra including eight apices and presenting the appearance of a six-pointed star when viewed along the axis of any one of the eight apices. In one described embodiment, the body is disposed within a transparent housing filled with a transparent liquid, the body having a density different from that of the liquid such that it slowly moves from one end to the opposite end of the housing when inverted. In a second described embodiment, the body is enclosed by a housing having a plurality of planar faces to permit the geometric body to stably rest in any position on a flat horizontal surface.