Mix flour and salt. Add food coloring to water and  gradually mix with flour. Knead. If the dough is too stiff, add water. If it is too sticky, add flour. Roll dough out with a rolling pin. Cut into shapes with cookie cutters. Poke holes in shapes for hanging if desired. Bake shapes on foil covered cookie sheet at 350^o for 10 minutes or until completely hard. Cool & paint.