Cool, trendy, DIY and ideas for teen bedrooms girl teen bedrooms, boy teen bedrooms, small bedrooms for teens, teen bedroom decor..Fun Teen Bedroom Ideas. A creative swing or hanging chair. A hanging bed. A wall mounted fish tank. A round bed. A chalkboard wall where they can express themselves note chalkboard paint is available in other colors besides black. Hot pink, cobalt blue and lime green are among the latest offerings .