Star Sand ends with two images that contrast beautifully.
We would have a large sandbox full of grains... along with a field of gravel that went on for miles.
(image of Cueball, the "sandbox full of grains", and the edge of the "field of gravel") note
The little sand patch would contain 99% of the pile's individual grains, but less than 1% of its total volume. Our Sun isn't a grain of sand on a soft galactic beach; instead, the Milky Way is a field of boulders with some sand in between.
But, as with the real Earth seashore, it's the rare little stretches of sand between the rocks where all the fun seems to happen.
(image of Cueball building a small sand castle) note