4. Calming prison cell
This invention has supposedly brought one of the greatest news for inmates all around the world. The idea of calming prison cell generally denotes a square room which has high-quality large projectors on each wall, the prison guards are in duty to choose what to play on that screen. In general, clips showing tropical forests or calm oceans are chosen in order to relax the inmates in a form of meditation. One of the soothing inventions of 2014.