| 摘要 |
A puzzle system comprises a first and second polyhedral object (1,2;52,53). The first polyhedral object (1;52) comprises at least a first picture-bearing face (5;11-16;57) and the second polyhedral object (2;53) comprises at least two picture-bearing faces (7;17-22;59), each picture on an associated picture-bearing face (5,7;11-22;57,59) being displayed correctly at one intended angle ( alpha , beta ) about an axis (6,8) perpendicular to the associated picture-bearing face (5,7). The puzzle system comprises co-operating detection and sound-emitting systems, arranged to emit a first sound only upon detecting that the first and second polyhedral object (1,2;52,53) have been juxtaposed with a face of the first polyhedral object (1;52) facing a face (54) of the second polyhedral object (2;53) and with a picture on the first picture-bearing face (57) of the first polyhedral object (52) at its intended angle being observable adjacent to a picture on a first picture-bearing face (59) of the second polyhedral object (53) at its intended angle when looked at in a direction substantially parallel to the facing faces. <IMAGE>
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