There is no better way to learn electronics and programming than building your own gadgets with Arduino and Raspberry Pi. If gaming is your thing, you may want to build your own Game Boy with a Pi computer. taifur has shared a project that shows you how to do just that.
This project shows you how to build your own portable game console. It has a 3D printed enclosure, 1 x 2.8inch PiTFT, a 2200 mAh battery, tactile buttons, and a few other simple components.