I saw this in the January 2015 issue of Highlights' High Five magazine and had to try it with my son. He loves any painting project! We really enjoyed the process and it turned out beautifully!
Here's what you need:
First you need to paint a light layer of water over your paper. Then let your little artist go to work with the watercolor paints. While the painting is still wet, sprinkle it lightly with salt. Let dry and then brush off excess salt. The salt crystallizes and lightly etches the painting, making it sparkle.