This is from TheVerge, I am pondering it for my Raspberry Pi, which I have to get around to ordering.
All you need to get started is a Raspberry Pi, of course, an SD card to store Coder, and a Wi-Fi connection. This being an open-sourced Google project, the software runs in the Chrome browser — what else would you expect? The entire code library is available on GitHub for experienced developers who want to edit to the software itself, rather than just use it to build stuff. Google says it built Coder to be used in programming projects from groups such as Codeacademy and Khan Academy. The software even includes a few web apps that users can get things started with, such as an eyeball that is animated to blink.