Spy Coin, Hollow coin to transfer messages. Jan 11, 2007 - the U.S. issues a spy coin warning after discovering tiny transmitters in Canadian coins, planted on U.S. contractors with classified security clearances
Eyesight-Adjusting Screens : Adjust to Your Eyesight
Eyesight-Adjusting Screens- This prototype concept is hi-tech -- rather than having to wear glasses to see better, it lets the object adjust to your eyesight. This idea by Ryan Jongwoo Choi is called the i-Free.