Side note, the following caution was posted under the video by someone commenting on the tutorial:
CAUTION! This is indeed a great use for styrofoam, but keep in mind that styrofoam is a petroleum product and is HIGHLY flammable; not only that, but if it is melted or burned it gives off toxic chemicals. So just be sure that if you are going to emboss anything on your project and use the homemade shavings on it that you do so BEFORE you put the styrofoam on. It is also hazardous to use any product that contains acetone with styrofoam - cause it can cause the styrofoam to melt (an example would be aerosol spray paints).
If you make any, we would love to see it! I think I will be making a trip to the dollar store to try it out myself. I will let you know how it turns out.