please point me in the right direction

Okay, let me try to explain what I want to do, so you can point me in the right direction. I want to take this room and make every object that I’m going to put in this room have physics. I want to be able to move and drop objects (furniture) with the mouse. I know how to make an object physics based, but I don’t know how to drag and drop them around with the mouse. Can you please point me in the right direction.
If I confused you, or didn’t give you enough details I will try to explain it better.

gonna need a mouse over sensor and I left or right click sensor and an empty motion actuator, and you’ll need a python script to do this, it might be difficult to script such an action but maybe there’s a way to do what you want.