Fill nylon stocking with concrete for the base. Create gills underneath the cap with thin sheets of metal. Sculpt a mold for the cap, and press it into WET sand lined with a thin sheet of plastic, and slowly fill with concrete. Add realism by removing sma
Make smaller rocks from hypertufa by just plopping a half shovel full into plastic shopping bags, twist them closed and lay them on the ground on top of the twist to keep them closed. Two days later, unwrap them, and out they go to your garden bed edge.