Nestle each of your marbleized eggs in its own bed of grass. Using cardboard dividers, create 12 compartments in a shallow box or an empty shirt carton, then fashion a snug nest of dried grass inside each square. Save the lid for storage.
After washing back the red, I had to etch it as that red didn't want to let go. The next color was teal, though my camera picked it up as more turquoise. You will be able to see the true colors in the finished photos taken with my scanner.