Abstract: A spherical puzzle comprising a first semi-spherical shell engaged with a second semi-spherical shell. Each shell has four triangular panels held by a plate with the four triangular panels on each plate forming an intersecting track running perpendicularly along an x and y axis. The track on the x axis of the second semi-spherical shell forms a continuous track with the track on the x axis of the first semi-spherical shell and the track on the y axis of the second semi-spherical shell forms a continuous track with the track on the y axis of the first semi-spherical shell. A plurality of sliding tiles forming a predetermined pattern or design are placed on the intersecting tracks. One semi-spherical shell can rotate relative to the other semi-spherical shell about an equatorial axis.

Abstract: A spherical puzzle comprising a first semi-spherical shell engaged with a second semi-spherical shell. Each shell has four triangular panels held by a plate with the four triangular panels on each plate forming an intersecting track running perpendicularly along an x and y axis. The track on the x axis of the second semi-spherical shell forms a continuous track with the track on the x axis of the first semi-spherical shell and the track on the y axis of the second semi-spherical shell forms a continuous track with the track on the y axis of the first semi-spherical shell. A plurality of sliding tiles forming a predetermined pattern or design are placed on the intersecting tracks. One semi-spherical shell can rotate relative to the other semi-spherical shell about an equatorial axis.

Abstract: This invention relates to an instructional device comprising a casing snugly enclosing a first central insert component and a second insert component. Each insert component has a combination of protruding fences, walled openings, and plain openings on a top and bottom surfaces. The first central insert component and the second central insert component is stacked together with the bottom surfaces of each central insert component communicating directly with each other resulting in the top surface of the first central insert component facing away from the top surface of the second central insert component. The stacking of the bottom surfaces with each other forms a series of internal enclosures and pathways while each top surface of the central insert components forms a series of external enclosures and pathways.