Wrap some baker's twine or other string around a wooden block to create a graphic textured stamp. -can also use rubber bands- Stamp on inside of paper bags from grocery store or paper that comes in mailed packages, use as wrapping paper.
I spotted these paper diamonds over at MiniEco and will be giving them a try this weekend. How cool are they in a rainbow of colors? Pop over to Mini-eco for the printable template and complete step-by-step instructions.