My 4 year old boy wanted a makeover in his room too, so after much indecision he decided on Lego Star Wars.
I was going to repaint the walls, but that didn't end up being a necessity, so instead I just printed off Lego Star Wars characters and blue tacked them to the walls.
I gave his furniture a little rearrange, adding some toy storage cubes from the toy room into his bedroom. I then used his large plastic storage boxes and stacked them with larger toys. On the fronts I attached labels I printed off using a Star Wars font.
He had a nice brown blanket he uses in winter which covered his quilt and various quilt covers so I didn't invest in any new bedding.
I added a black basket at the end of his bed for his dress up storage. Little boys love to dress up too! And a basket for all his lightsabers.
I'm still deciding on a new rug, either green or blue.
Finally, around the room I put on display some of his Star Wars toys.
And he is one happy little Lego Star Wars fan.
We had wanted to get him a loft bed as his room is quite small but those beds are quite expensive and Hubby is confident he can raise up his current bed. So that's Hubby's next project.