You and your child can decorate pictures and cardboard picture frames or simply have fun playing in the bucket of colored rice you make! This is not an exact science, so anyone can make it!
Pour as much dried white rice (or dried pasta) into a plastic zipper bag. (I even use empty, shaken-out bread bags and just tie a knot in the top before shaking.) Add several drops of food coloring (your choice) and about a teaspoon of rubbing alcohol (which helps the color dry faster). Close the bag and shake until the color is dispersed throughout. If it needs to be darker, simply add more color and alcohol. Lay the rice out on a cookie sheet or some newspaper to dry (usually about 30 minutes to an hour).
Read about more ways to have fun with colored rice here: http://www.mommynature.com/colored-rice-pasta-recipe.html