Paint is always a quick & inexpensive way to dress up a room. You could get a favorite character or ship from the movie and have it blown up, then trace it onto a wall and paint it, or just do plain neutral paint (like maybe gray) and use star wars toys & bedding to bring the theme into the room. You could get posters to decorate the walls with or giant cardboard cut-out of his favorite characters to stand in a corner.
When I did my son's room, the theme was his favorite NFL team, so I got him a bedding set, curtains, a pop-up hamper and a throw rug with the team's logo on them, but the walls I left neutral. He has a couple of team posters and a shelf with team memorabilia that he has collected. Voila', a themed room that can be easily changed out for something else.
at 2:35 PM on Feb. 22, 2010