Remember the fad of colored sand designs and pictures in glass bottles? I made some of those with plants added to give to friends. Then the glass factory near here went out of business...
http://sandgallery.com/Here's my other personal experience with sand. I made it about 30 odd years ago to fill a large space on my living room wall. It's 4 feet long and made of masonite on which I glued sand that I colored with powdered paint. The sand is construction grade so it has little stones in it adding to the look I was trying to achieve of a cave wall.
[attachment=1002:sand_mural.JPG]
oooow ....Cave Women.... ug.
I like it, it reminds of those old caves you often see on NatGeo. I've seen a few in the desert, not with sand but the same theme. Sand gives it another dimension.