| 摘要 |
Interlocking educational and recreational blocks in three-dimensional right rectangular form adapted to be connected vertically or laterally to form larger structures. Each block is characterized by a plurality of projecting connecting members on one surface and corresponding mating recessed connecting members on the remaining faces of the block. When precisely manufactured, the interlocking blocks are especially adapted for use in teaching the metric system and other mathematical concepts to school children and others.
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