The red button on the Game Boy glows softly. It lights up when someone presses it, making a small popping sound. I press the button carefully, watching as the screen turns to a colorful picture of Mario walking through grass. He stops and looks around, then jumps high into the air. The screen buzzes gently each time he bounces. I try pressing other buttons, but they don’t do anything. Only this red button makes the game work and show pretty pictures.