A new case for the Raspberry Pi has been successfully funded on Kickstarter, and it comes with almost 200 RGB LEDs built-in. The LumiCube should be simple for Raspberry Pi beginners to realise and includes an IPS display, among other features.
https://www.notebookcheck.net/LumiCube-A-case-for-the-Raspberry-Pi-with-192-LEDs-an-IPS-display-and-various-sensors.528525.0.html