The Raspberry Pi is a complete computer which costs 30 euro. It can be used to browse, write letters, read mails or chat through Facebook. But these are the boring things you can do even with Windows! Using Raspberry Pi, the ideas become real. Let’s do some examples. Do you want to switch on/off the light of your room using your mobile phone? Do you want to create your own telephone exchange or a private internet with your neighbourhood? What about a car or panzer scale model which can move like a drone when you drive it staying back to your PC or tablet? The frontal lesson activity will show "what" you can do with the Raspberry PI and, the most important concept, "why" you should do that.