A sensing device, a ball shaft for smart magic cube, and a smart magic cube are provided. By optimizing the sensing device of the smart magic cube, only two circuit boards are needed to sense rotation states in six directions, thereby changing a current technology that requires setting PCB boards and sensors in each direction of the smart magic cube. The smart magic cube has a simple structure and is easy to assemble, which may reduce production costs.

A logic cube with changeable tiles is presented. The tiles which can be fit on the logic cube, have indicia in well-defined positions and orientations such that the resulting solid is an exact but larger replica of the initial logic cube. The tiles are such that they can be easily fit or removed, and do not fall off with the movement of the logic cube. They also do not obstruct the functionality of the logic cube. Other geometric shapes such as tetrahedron and dodecahedron and sizes other than 333 may be used.

A polyhedron gaming device having planar faces. Each face includes at least one opening. Response units are secured separately about each opening such that a top edge defined by the response unit is positioned in the openings and substantially flushed with a surface of the tiles adjacent the opening thereby maintaining a substantially planer face. A pair of side faces are able to twist in relation to a center dial. A processor with gaming content is stored on a memory and is in communication with lights, sounds, and switches. When activated, the processor activates or deactivates light sources and sounds prompting a user to respond by maneuvering the polyhedron housing such that the line of sight of a light source changes wherein the user is able to respond to the pre-programmed gaming content by pressing one or more switches or twisting the ends.

A puzzle cube includes a core, to which a plurality of central and peripheral cubies are movably associated. The core has two hemispherical shells, of which a first one is associated with a first portion of the central and peripheral cubies, and a second one is associated with a second portion, complementary to the first portion, of the central and peripheral cubies. In a closed configuration, the puzzle cube is assembled, and the two hemispherical shells are coupled and define a closed cavity therebetween. In an open configuration, the puzzle cube is divided into two complementary parts, the two hemispherical shells are separated, and the cavity is open and accessible by a user. The transition from the closed configuration to the open configuration occurs upon the simultaneous pressing of all the central cubies by the user, only when the puzzle cube is solved according to a single predetermined combination.