Gak: 1 cup Elmer's glue, food coloring, 1 cup liquid starch Pour glue and coloring in plastic container. Stir until color is thoroughly mixed in. Add starch a little at a time, stirring with a spoon or kneading with your fingers as mixture thickens. Keep stirring until mixture holds together like putty. Test with your fingers: if too sticky, add more starch in small amounts until mass is smooth and rubbery.