Step 1

In a small pot, mix together the baking soda and cornstarch. Stir in the water until completely blended.

Step 2

Place pot over medium heat and cook, stirring constantly for 10 to 15 minutes until the clay begins to form. Remove from heat and continue stirring until the mixture becomes a sticky but soft dough.

Step 3

Allow the dough to cool to the touch.

Step 4

Place dough on a surface coated with additional cornstarch. Begin kneading the clay adding more cornstarch as needed until the clay becomes smooth and the tacky feeling is gone.

Step 5

To store, wrap tightly in plastic wrap and place in an airtight container.

Step 6

To dry, place shapes on a drying rack. If needed, flip shapes over after one side has dried. Depending on the thickness of the object, the clay may take up to 3 days to dry completely.