The Key-Copter...
[http://youtu.be/nUFbIoGOaWI] (YouTube link)Never lose your keys again! This invention from Michael Wallis, while taking up so much space on your key ring that you'll never want to carry it, will bring your keys back to...
https://www.neatorama.com/2012/08/31/The-Key-Copter/
