Toy displaying erratic tumbling movement

An erratic movement toy comprising:

• (a) a hollow housing comprising:
• (i) two parallel generally planar surfaces of triangular configuration;
• (ii) convexly curved side walls interconnecting each side of each of said triangular planar surfaces with a corresponding side of the other of said triangular planar surfaces to provide convexly curved pivot surfaces extending between every side of each triangular planar surface and a corresponding side of the other triangular planar surface;
• and
• (b) a spherical body confined within the interior of said housing and freely movable therein, said spherical body providing means for causing said housing, when disposed on an inclined supporting surface, to tumble from one of said triangular planar surfaces to the other in an erratic manner through whichever of said convexly curved pivot surfaces said spherical body impacts.

An erratic movement toy comprising:

• (a) a hollow housing comprising:
• (i) at least two major generally planar surfaces of polygonal configuration;
• (ii) convexly curved side walls interconnecting each side of each one of said polygonal planar surfaces with a corresponding side of another of said polygonal planar surfaces to provide convexly curved pivot surfaces extending between every side of each polygonal planar surface and a corresponding side of another polygonal planar surface;
• (b) a spherical body confined within the interior of said housing and freely movable therein, said spherical body providing means for causing said housing, when disposed on an inclined supporting surface, to tumble from one of said polygonal planar surfaces to another in an erratic manner through whichever of said convexly curved pivot surfaces said spherical body impacts;
• and
• (c) means providing open corners between adjacent ones of said curved side walls, said open corners being sized to permit said spherical body to protrude therethrough sufficiently to provide a relatively smooth curved pivotal surface between corresponding corners of said polygonal planar surfaces.