| 摘要 |
PURPOSE: A teaching aid for a component magnet is provided to enable an infant to stably assemble blocks by preventing a permanent magnet from being exposed at the outer side of a block body. CONSTITUTION: A block body(10) is made of nonferrous metal and receives a permanent magnet(20). The permanent magnets connect the block bodies with magnetic force. A core is located in the center of the block body. The permanent magnets are received in a receiving groove(13) on walls(12) surrounding the core. The core is bonded with the walls. |
