As I am now entering the detailing phase on the Grain Elevator Diorama I have to come to the spot where I need some help. One of the details I would like to model is spilled grain along the tracks and in the area where the grain would be filled into the cars. Anyone have any suggestions as to what I could use in HO? I was thinking colored sand that kids use in craft projects. Or maybe sand and then color it myself. How would I color it?