Abstract: A record/playback module includes a case and an electronic circuit supported by the case for recording an audio message under control of a user and thereafter automatically playing the audio message in response to a change in ambient light. The electronic circuit has a RECORD mode of operation in which the electronic circuit records the audio message and a PLAY mode of operation in which the electronic circuit plays the audio message. The electronic circuit includes a first switch for initiating the RECORD mode of operation and a light sensitive subcircuit for initiating the PLAY mode of operation. The light sensing subcircuit is adapted to initiate the PLAY mode of operation when a second switch is in a first switch position and the ambient light increases, and when the second switch is in a second switch position and the ambient light decreases.