Abstract: A toy for constructing different geometric shapes has a plurality of hollow prismatic identical toy elements having a triangular base and quadratic faces. The elements are connected at two faces to adjoining elements by spring biased headed pins passing through aligned throughbores in the centers of the two faces to permit relative rotation about axis normal to the two faces. The elements are maintained in any one of a plurality of angular orientations by projections on one of the two faces of each element and depressions in the other face of each toy element.

Abstract: A spatial logical toy is formed from a total of eighteen toy elements, out of which two sets of eight identical toy elements two connecting elements are provided. The elements of the two sets have cam members with hollows with spherical convex or concave surfaces in-between. The elements are connected by the aid of the cams and the two remaining centrally positioned substantially identical connecting elements each having a T-shape cross-section and when assembled the toy is in the form of a regular or an irregular solid. Fixation is performed by one single screw passing through bores in the connecting elements. In such a manner the toy elements forming the lateral faces of the spatial logical toy can be rotated along the spatial axes and by yielding several variation possibilities the toy is well suitable for stimulating logical thinking activity.

Abstract: A spatial logical toy in form of a regular geometrical solid, the toy-elements of which are assembled so that halves of the logical toy taken along any axis can be rotated in any direction of any of the spatial axes of the body in relation to the other half. The toy comprises a total of eight toy-elements, seven of which are identically shaped and are designed in such a way, that the corners are directed to the geometrical center of the body forming the spatial logical toy and are formed as profiles with a spherical surface. In the assembled state, between the profiles a hollow connecting element with a spherical surface on the upper part and having a T-shaped cross section is arranged. At the bottom of the hollow part of the connecting elements is a bore and a threaded pivot enclosed by a spring reaching to the bottom of the recess is passed through the bore and the threaded end of the pivot is screwed into a part of the eight toy-element which is directed to the geometrical center of the solid.