I was just looking at concrete blocks yesterday at Menard's and thinking of all the uses for them. This is a really neat idea because it can look like part of the garden area and still be functional. I am always working on the ground to pot things up (or in the garage where I have to sweep afterwards).
On another note, we we came out of Menard's, there was a pickup in the parking lot and it had a very decorative patio railing on the two sides and in front around the bed of the truck. It looked so cute and reminded me of a baby's bed with no mattress. I bet it comes in handy when that person needs to haul extra bags of mulch or whatever!