Objects on Stage

I am learning to generate MovieClips on the stage with ActionScript 3.0. I used a variable to create several movieclips successfully. They are each separate instances with their own names. However, I cannot figure out how to manipulate them more once they are up there. I am capable of id-ing the names of the movieclips with a mouse-over trace function:

trace (event.target.name);

But I do not know how to manipulate the target itself, which is my aim. I can only use the variable to manipulate the last movieclip object created on the stage. I am not looking to use the variable to do manipulation, I want to use the name to do the manipulation.

Can I do this or am I fooling myself?