I love this idea. It's simple and high impact. Plus if you do this centerpiece at the beginning of the Summer it will last long into the Fall. Grasses are wonderful for their durability as well as their beauty. Where I used to live I had all different kinds of them dotting the front garden and they looked beautiful even when snow covered. You can use any kind of grass to do this centerpiece OR if you prefer, you may use colorful potted plants. Just stick the plant in a Mason jar that fits into the cinder block. For complete instructions please click here.