My attempt to think "outside of the box" with this challenge has apparently failed spectacularly, because...
My project is IN a box, a shadow box to be exact.
When I saw that the challenge was to "Think Fall" I immediately thought of Halloween. I love this time of year for the cooler weather it brings, fresh apples, good memories, and of coarse the spookiest holiday of them all!
I made this using the Mini Monsters Cricut cartridge. The "Happy Halloween" was applied using purple vinyl.