Does your room not have enough space? do you wanna get rid of any babyish stuff? or maybe your just tired of the same old thing. boy or girl, I'm gonna help you out.
Step 1: Painting
if your room looks horrible, you should give it a serious paint job. so you can either use the same color or a different color. you could also paint a small portion of it with chalkboard paint. also wrap yarn around the roller for a cool effect.