In this option I am planning to make a design a of simple  house/ structure unit and make the doors and window close and open by making use of  proximity sensors. Here I would only make a prototype (a model) of the house and  implement the sensors for the windows and the doors. If favorable condition is apparent,  I will experiment with sound and pressure sensors. I will be operating the  sensors by using arduino (analogue input: sensors, and analogue output motors).  And I also want to combine Processing with arduino in order to get a graphic (on  monitor) version of what is happening  physically  on the modeled prototype.