LEGO is on a nostalgia kick at the moment, laser-targeting millennials like me with retro gaming sets, including a 1:1 model of the original Game Boy. Natalie The Nerd was already a notable Game Boy modder with an online parts and service shop, so modifying the official LEGO set with replica Game Boy guts (spotted by PCMag) was likely child’s play for her. The original Game Boy hardware isn’t fantastically complicated, even by late-80s standards, and its big brick-like housing offers plenty of workroom. Her final product preserves all of the exterior LEGO parts, including the brick buttons, with only the “screen” and faux cartridge parts modified to the naked eye. It’s running off of genuine Game Boy cartridges, not an emulator setup, which would probably be a lot easier.