In this paper we present a natural interaction system that simulates an interactive mirror behavior where a subject or object can appreciate in real time the effects of external agents over themselves and the causes or actions that trigger these effects. It is a low cost system and easy to use, personalize and configure, which makes it extensible to different operating sectors, especially on the education area for interactive demonstrations. The system does not use marks and realize the detection and projection of effects in real time. For the system development a technology was invented and developed that originated the patent request ES200901210.