To make these lace-like stepping stones you will require concrete stepping stones in any shape, outdoor spray paint, outdoor paint sealer and a lace or plastic doily/mat. Scrub and clean all the stepping stones and let them dry completely. After that on each stepping stone put the doily as a stencil and spray over it. When you will remove the doily you will get a lace pattern over it. For better results choose that color of spray paint that is clearly visible over the concrete stones. Then spray the stones with paint sealer. Let them dry, place in your garden and enjoy the view. For further details visit the tutorial at instructables.