We built an interactive Flash application which you can use to understand the different types of recording media like music cassettes, compact discs, etc. Every storage media is shown in an interactive exploded view where you can see the component parts. Other layers, accessable by arrows on the screen borders, show historical information and technical facts comparable on all devices and on the last layer one can simulate recording, erasing, fast forwarding and rewinding sound clips on a CD in a simple way. The project is not fully worked out but the current state could be demonstrated if desired.