Adding mouse in fluid boxes

[#1]

Is it possible to add a mouse object inside a fluid box?  We use the mouse often in our non-responsive projects to demonstrate (not for actual user interaction), but when I tried switching to responsive projects and using fluid boxes, I cannot seem to add the mouse within the fluid box.  

[#2]

Is it possible to add a mouse object inside a fluid box?  We use the mouse often in our non-responsive projects to demonstrate (not for actual user interaction), but when I tried switching to responsive projects and using fluid boxes, I cannot seem to add the mouse within the fluid box.  

[#3]

You can add a mouse object but it wil never be IN a fluid box.