When we moved into our current house, I wanted to give my daughter a room she could grow up in, and not completely grow out of. I didn't want to do a princess theme, even though she was only 2 1/2 when we moved, and LOVED everything princess.
Instead, I decided to give her a "Thinking Tree" with painted walls of rolling hills and flowers. My grand plan was to paint the fields, paint flowers then put a white picket fence on top of the painting, to give it a meadowy type feel to it. I never got that far. After painting the meadow, and hills....as well as the sky, I painted a tree trunk in the corner of her room, and then proceeded to make fabric leaves out of different shades of green material, and pipe cleaners as the "stem"....and attach them to the ceiling to make a "thinking tree" for her.
Here is a picture of her room when we moved in:
It is super easy to do. Just draw a template of a basic leaf shape. Make sure you cut out 2 pieces of fabric (right sides out), so they match up, then take a pipe cleanerand place it in the middle of the 2 pieces of fabric, and stitch a zigzag stitch over the pipe cleaner to hold it in place. Once you have done that, you can cut small pieces of fusible interfacing, and before hanging the leaves, simply iron the two sides together around the edge with the interfacing. It helps shape the leaves, and holds the 2 sides together.
Everyone who sees my daughters room LOVES it, and all of her friends have told me they want a tree in their rooms too! LOL If you have any other questions on how I did it, let me know, and I can try to give more details on it.