2 c. table salt
2/3 c. water
1 c. cornstarch

Mix and stir salt and water over heat 4-5 minutes. Remove from heat. Add cornstarch and 1/2 cup cold water. Stir until smooth. Cook until thick. Store in plastic bag. This may be colored by adding food color to the cold water. The colors will be nice and bright. Air dry finished product. Great for relief maps for older children.