Rasmus Hauschild from Denmark was 14 years old when I previously featured another build of his on the blog. This time he has gone small with a 3D-printed Gameboy case running RetroPie called Pi Zero Gameboy Nano. Inside is a Raspberry Pi Zero. You can print and assemble your own by downloading the files from Thingiverse or you can buy one customised to your requirements for $250 direct from Rasmus.