Abstract: A five-layer intellectual cube includes six sides, each of which is divided vertically and horizontally into five smaller movable surfaces respectively so that each side has 25 smaller movable surfaces. By rotating the six sides, the arrangement of the smaller movable surfaces can be changed to provide a variety of combinations by colors or patterns. The cube includes a central axle block, six first blocks, twenty-four second blocks, twelve third blocks, twenty-four fourth blocks, twenty-four fifth blocks and eight sixth blocks arranged so that the blocks can be assembled into regular sub-units that can easily be stacked to form the cube.

Abstract: A four-layer intellectual cube is divided on each side thereof horizontally and vertically into sixteen movable smaller blocks. These smaller blocks can be rotated and can slide to change their orientations, so that every side of the intellectual cube can be varied in combination by colors or patterns, and this can arouse brains of people to get an intellectual enhancing effect. In this structure, each side of a central member is mounted with a rotatable block, a first and a second slidable block are clamped between every two rotatable blocks, these slidable blocks limit rotation and sliding areas of four central movable units, eight edge movable units and four corner movable units, in this way, sliding of each movable unit on every side of the four-layer intellectual cube provided with different colors or patterns in operation can change its position, so that the six sides are varied in combination, and thereby complexity of the cube can be increased.

Abstract: A two-layer intellectual cube composed of eight movable smaller blocks, each side thereof is divided horizontally and vertically into four areas with different paterns or colors; these smaller blocks can be rotated to change their orientations, so that every side of the intellectual cube can be varied in combination, and this can arouse brains of human to get an intellectual enhancing effect.