Purchase stair risers from your local home improvement store...paint it white and add some window boxes... small herb garden?
talk about an inexpensive project...all you need is an old magazine that's laying around and Elmer's glue
Natural weed killer::2c white vinegar + 1T dish soap + 1T. salt. Blend and pour into a spray bottle. Will kill anything! (Easily gets rid of all those weeds growing in the cracks and seams of the driveway.)