Glued all my scrap pieces of foam with Glidden Gripper (Thanks Terra!) ... rubberbands came in quite handy to hold them together while they dried. 24 hours later I shaped & painted them with a base coat. Next step was to bend some mesh wire into a mound. Place over plastic & arrange your stones. Used Great Stuff to glue the stones ( ran out & ended up using hot glue for the rest). After a few hours you can move it around & tea stain the stones with additional paint. I finished it off with a faux stone spray paint. Will probably find some dead grass & tuck between some of the stones. Thin metal stakes should be enough to hold the wire down in my yard in front of the tombstone.