This is a project that we did with our grandchildren. We had a collection of various tiles left from projects and some new tiles that we collected. I found a “how-to” guide online that suggested laying out your tile design, then laying contact paper sticky side down on top of the design to hold the tiles in place. The tiles (stuck to the contact paper) were then put on the bottom of a mold, and the concrete was applied on top. This approach worked pretty well and we have made several batches.
We have collected a lot of tiles, and we want to make a path through our ivy, so there will be a few more batches.