Trying to use the following demo example, using the 80px x 80px snap to grid demo.
http://jqueryui.com/demos/draggable/#snap-to
Is there someway to show a grid in the background it can snap too? As right now it's just a white background.
Make an 80 x 80px box with your favorite image editing program, set it as the background of the container, and set:
background-repeat: repeat;
That way, the background will tile.
Rough demonstration: http://jsfiddle.net/mostthingsweb/cRayJ/1/