| 摘要 |
An educational toy that lets the user experiment with assembling hollow polyhedral building block in a variety of different ways. The toy includes new polyhedral building blocks which can be assembled in different ways to form a multiplicity of configurations. It allows the user to assemble building blocks to one configuration and then to change over from this configuration to another configuration by rotating, pivoting, rolling, or shifting one or more of the already assembled building blocks. The toy can be used to introduce the user to different number systems and arithmetic and geometric principles.
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