MarioCard is a game with three small cars that drive around a course built from post-it notes which is meant to remind one of MarioKart the video-game. The carts each are controlled by a phone app that allows the user steer using the phone like a steering wheel and are equipped with a color sensor which allows the post-it notes to be used like power-ups and penalties in the game. A server written in python runs on a Raspberry Pi, routing signals between the different carts and managing the game state.