Wooden Cubes (they cost a whopping $2)
Nine patch blocks are comprised of nine units, laid out in three rows of three patches. Put together, you can make plenty of traditional block designs, or you can go with something more contemporary. Simply color the design with a Sharpie marker onto the sides of the wooden cubes.
There are plenty of other design options for your cube's sides besides the ones above,
get creative and start designing your own quilt!