Every month has a classic decor symbol and if you are beyond "Back to School", I think August's is the Sunflower. I noticed a garden full of them in bloom on the road side just the other day. I have had no success growing the ( I have a paper thumb - NOT a green one!) so instead I make them. I have uploaded to the 3dcuts store the cutting files for this triptych.
Cutting file link: http://www.3dcuts.com/shadow-boxes-nature-themes/sunflowers-shadow-box
Tutorial Link: http://www.3dcuts.com/tutorial-sunflowers-shadow-box