Color sand painting should fill the color quickly and smooth the sand. You can apply one color at the same time-uncover the paper in the same color area, then sprinkle with sand, shake the paper left and right, and let the sand automatically stick to the sticky part. If it sticks unevenly, you can sprinkle extra sand and continue to shake it until all the sand is stuck. Then change it to another color.

Generally speaking, do dark color first, then do light color. This is not easy to mix colors.