Here is another cool gift idea for retrogaming fans in your life. The OLEDiCADE is a tiny game console with 4 games for you to try. It lets you play Pac-Man, Flapppy Bird, Breakout, and Octopus anywhere. The console has a 56×28 mm PCB and 190mAh battery.
The developer is planning to release a 3D printed case for this too.