| 摘要 |
Known teaching and amusement apparatus comprises a self-contained electronic "pen" which is used in conjunction with specially printed material to provide an interactive system e.g. in the form of a worksheet or book having question and answer areas. The "pen" used senses differences in the infra-red radiation properties of the answer areas to indicate audibly whether a correct or an incorrect answer has been selected. The invention relates to an improved "pen" (10) which operates in an active mode and a programming mode. A switch (12) changes the mode of the "pen". In the programming mode, the "pen" is programmed to operate according to the printed material on which it is to be used. The "pen" (10) further includes a visual display (13) for indicating whether a correct or incorrect answer has been given. |
