A constructor of tetrakaidecahedra containing a set of main blocks (1), while the design, shape and size of the main blocks (1) are the same. The main unit (1) is a tetracaidecahedron with six square faces (8) and eight hexagonal faces (9). Six square faces (8) are divided into three groups, with two square faces (8) in one group parallel. The eight hexagonal faces (9) are divided into four groups, with two hexagonal faces (9) in one group parallel. Two or more main blocks (1) are interconnected by insertion and / or all-in-one interconnected and form one group. A spike (3) is made on at least one of the square faces (8) of each main unit (1), and a nest (2) is made on the other square face (8) located on the same center line with a spike (3). The spike (3) and the socket (2) of any two main blocks (1) or main blocks in any two groups correspond to each other. Two or more main blocks (1) in one group are connected and form a complex.
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