Heya. I am hoping to make some garden paths in our back yard. Our border collie decided where they need to go, and I am going with the "if you can't beat them, join them" attitude. (See first pic, an example of what she has already made). I also have quite a bit of black pebbles (around 100kg I think), collected from aroundthe pool area, as we will be grassing that. So, ideally I would be using them between the stepping stones, as I already have so many of them. I originally wanted to create a mosaic sort of path out of them and white pebbles, but they are not uniform in size and might not be fun to step on. My questions are: should I concrete the whole thing in? And, should I edge? Really don't like the plastic edging, and metal seems harsh to accidentally step on… Any advise would be greatly appreciated.