Paper bag tree - great idea! You can make these for each of the seasons. For fall, multi-colored paper; winter, you can use cotton balls. Spring can be pink paper for cherry blossoms. Summer, just use green paper.
Great way to add depth and color to any area. Use green crepe paper. Attach paper to the base of the wall. Twist paper and cut in varying angles. Add colorful ocean art items to complete the scene. cokesburyvbs.com