If you are still lost here is the wiki
<a href="http://en.wikipedia.org/wiki/Sandpit" target="_blank">http://en.wikipedia.org/wiki/Sandpit</a>
and heres a picture
personally i just like to play with it. picking it up and pouring it again. burying things and finding them days later. its just fun. but thats not all the possibilities are endless.
so what do you fellas like to do in the sanbox
edit: adding water to sandbox filling it makes for endless fun