Three-dimensional jigsaw puzzle

A three-dimensional jigsaw puzzle, comprising:

• a three-dimensional core body having a vertical axis, said core body including a plurality of stackable block units formed by cutting said core body along a plurality of transverse cutting planes that are transverse to said vertical axis, each of said stackable block units having top and bottom surfaces which are opposite to each other in a vertical direction that is parallel to the vertical axis, each of said stackable block units including at least two block members formed by cutting each of said stackable block units along at least one vertical cutting plane that is parallel to and that passes through said vertical axis;
• and
• a plurality of interlocking members that are disposed to interlock removably an adjacent pair of said stackable block units;
• wherein said interlocking members are provided on said top and bottom surfaces of said stackable block units, said interlocking members on the same one of said top and bottom surfaces of each of said stackable block units are equidistant from said vertical axis;
• and
• further, wherein said interlocking members on said top surface of one of said stackable block units are spaced apart from said vertical axis by a first radial distance, said interlocking members on said bottom surface of said one of said stackable block units being spaced apart from said vertical axis by a second radial distance different from the first radial distance.