| 摘要 |
<p>This invention provides a device suitable for use as a toy or educational aid. It basically comprises a housing (4) covering two or more discs (6,7) bearing markings such as letters, numbers or other information. Viewing apertures (8) enabling a part or parts of each disc (6,7) to be seen are provided in the housing (4). The discs (6,7) are rotated at varying speeds and a reading is taken of the markings which appear in the viewing apertures (8) when the rotation ceases.</p> |
