EGGA, not SEGA? I made the megadrive controller into a paper egg pack. It is cheap enough to cost around 10,000 won. A YouTuber named Daniel Jansson did DIY the so-called eggcellent controller. Reinforce the inside of the egg pack with cardboard, and reinforce the joystick with scotch tape and shims first. Then, solder the Arduino and the buttons, and attach a sticker printed “Ega” to finish. Related information can be found here .