I'm a big fan of the Raspberry Pi and we have invested in a class set (with potable monitors) at Kingussie. We are using the Raspberry Pi's for various computing / maker projects at the moment. I am also enthusiastic about other similar devices such at the Intel Galileo and the new BBC MicroBit.
"The Raspberry Pi is a low cost, credit-card sized computer that plugs into a computer monitor or TV, and uses a standard keyboard and mouse. It is a capable little device that enables people of all ages to explore computing, and to learn how to program in languages like Scratch and Python. It’s capable of doing everything you’d expect a desktop computer to do, from browsing the internet and playing high-definition video, to making spreadsheets, word-processing, and playing games."
"What’s more, the Raspberry Pi has the ability to interact with the outside world, and has been used in a wide array of digital maker projects, from music machines and parent detectors to weather stations and tweeting birdhouses with infra-red cameras. We want to see the Raspberry Pi being used by kids all over the world to learn to program and understand how computers work."
You can make lots of cool stuff with a Raspberry Pi and I recently discovered that the Raspberry Pi Foundation has a Pinterest Board where that showcase some of the coolest Pi Projects. My favourite is the board on Games and Gaming but I also like the one on Wearables, Textiles and Fibres.