[header] How to redo your room when you become a teenager [title] Paint your walls or put up wallpaper. [step] If you have a childish theme, it's probably best to change it-unless you honestly like it. A good idea is to choose your favorite color. 
If you don't have one, then pick a neutral color that won't interfere with anything else in your room. When it comes to growing-up your room, simple is best.