I found myself looking for plasticine in my local art shop the other day (for moulding purposes) and became distracted by the DAS clay, and miliput that were on neigbouring shelves, so I ended up with those as well, just to try an idea that I have wanted to try for some time, even though I have no application for it currently..   Cobbles - specifically I wanted to try and get relatively even sized cobbles, over a large area without the awful joints that sheet materials often leave...   Step