Pour the dry ingredients into a medium mixing bowl and stir until well combined.
In a small bowl, stir the food coloring into 3 tablespoons of water.
Pour 2 tablespoons of colored water into the dry ingredients and stir until combined. Stir in the remaining tablespoon of colored water, mixing with your hands if needed in order to combine the ingredients more evenly.
Add small amounts of water (no more than 1 teaspoon at a time), stirring well between each addition, until the kinetic sand has the desired texture. It should be moldable like wet sand, but still feel fluffy and slightly crumbly. Start playing immediately and store in an airtight container when not in use.
Notes
While this recipe is technically taste-safe, baking soda can be harmful when consumed in large amounts. Children should always be supervised during play and shouldn't be allowed to eat large quantities of this sand.