Colored Salt

Colored salt can be used to make a variety of art projects, it's simple to make, and less expensive than colored sand.

Place salt and food coloring in a Ziplock bag, removing as much air as possible.
Knead the contents until all of the salt is colored. Pour the salt onto newspaper lined trays to dry for about 2 hours.

To make darker colors you will need to add more food coloring.
To make secondary or unique colors, mix salt with first color then add the second color and mix again.