Google Japan has come up with a wearable that is functional and good looking. The Gboard CAPS is a keycap shaped hat. But it’s not all aesthetics, the hat actually works as a keyboard with your mobile device via Bluetooth.
To type, you turn your head to select the key to press and nod to input the character!
A DIY design and schematics open source and are available for download, so you can create your own custom hat or add additional features to your existing hat: Hardware and software and Making your own hat (Japanese) although you can use any hat design. Gboard software is available for Android and iOS mobile phones.
See the video below and more here (Japanese).