What’s a Raspberry Pi?
The quickest way to understand what the raspberry Pi is to quote from The Raspberry Pi Foundation
The Raspberry Pi is a credit-card sized computer that plugs into your TV and a keyboard. It’s a capable little PC which can be used for many of the things that your desktop PC does, like spreadsheets, word-processing and games. It also plays high-definition video. We want to see it being used by kids all over the world to learn programming.
The Raspberry Pi can use a variety of Programming languages including Python and Scratch.
Scratch is a programming language that makes it easy to create your own interactive stories, animations, games, music, and art — and share your creations on the web.
As young people create and share Scratch projects, they learn important mathematical and computational ideas, while also learning to think creatively, reason systematically, and work collaboratively. (MIT)
Pi-Face Digital is the first of a range of interfaces to allow the Raspberry Pi to control and manipulate the real world. It allows the Raspberry Pi to read switches connected to it – a door sensor or pressure pad perhaps, a micro switch or reed switch, or a hand held button. With appropriate easy to write code, the Raspberry Pi then drives outputs, powering motors, actuator, LEDs, light bulbs or anything you can imagine to respond to the inputs (University of Manchester)