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.
Illusion Blanket, general instructions by Trish Smith (no specific written pattern). A very clever idea using corner-to-corner diagonal box stitch, with 4 panels joined as they are made. Color graph available on Ravelry page.