| 摘要 |
A building block system, in particular a toy building block system, comprises a plurality of inter-connectable building blocks (1), whereby each building block (1) comprises an undercut trough-shaped groove (3) on at least one lateral surface (2) into which a connection bar (5) with a cylindrical part (6)is insertable. The building block system is suited for a variety of uses, easy to handle and provides many form-locking connection options of one or several building blocks, including of building blocks of differing geometrical form. According to the invention, the connection bar (5) is also formed with a hammer head-shaped boundary body (7) on at least one end of the cylindrical part (6), which can be inserted into a corresponding recess (11) on the end of the groove (3) in the building block (1) so as to form-lock with the lateral surface (2) of the same, when the connection bar (5) snaps into the groove (3) of the building block (1).
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