After seeing a nice walkway made with beach glass I have been trying to figure out how to do something similar myself.  I decided I needed a tumbler in order to make the quantity of glass that would be needed.  Luckily, by searching the ‘net, I found someone else who did just that!

http://www.evilmadscientist.com/2011/the-beach-glass-machine/

Tumbled Glass

Tumbled Glass – AKA Beach Glass

I think this would be great for DIY projects such as walkways, mosaics, and other random stuff.