Might make an interesting diorama...think of all the cool (pun intended) de-icing ground equipment you could scratchbuild! I might suggest you purchase an issue of a model railroading magazine that has a feature on snowscapes. When cruising through the bookstores I've noticed issues that have articles on creating this effect, and I'm entirely sure that a visit to a hobby shop specializing in model RR accessories could offer good advice on materials and methods. Regards..Jack
What about going to one of those stores that sells all the little light-up Christmas houses? You can buy fake snow of all kinds and sizes (coarse to fine) in little baggies.
Its the perfect time of year for it!