Mix water and baking soda together until completely dissolved.
Add glue and mix until smooth.
Stir in 2-3 drops of food coloring. Continue to add more until you get the color you want.
Add saline solution and stir until it begins to pull away from the bowl and form a ball. Knead in your hands for a minute. If it seems too sticky, add a squirt of saline solution and continue to knead.