The folks at Adafruit have shared many cool Arduino and Raspberry Pi projects in the past. In their latest guide, they should how to build your own handheld computer that is powered by a Raspberry Pi. This retro mini laptop is made using a Pi 2 and a 3.5” PiTFT. It also has a 3D printed enclosure and a 2000 mAh battery,
The above video gives you a better idea how the Raspberry Pi notebook was built. You can find out more about this project here.