Garden art possibilities. Drill Cores (Galgate LA2)

12 moon shaped concrete cores and 1 smaller round one. I thought that they could be used for a garden project or art installation? The tennis ball is for perspective.They would fit into the boot of a car or if you're stuck for transport I might be able to drop them in the S Lancaster area. I don't think my first pic did them justice! These are from one of Lancasters historic listed buildings, so they are not going in the skip on my watch!