Things You'll Need
Instructions
Place the baking soda and cornstarch together in a pot and mix with a spoon.
Add the water and stir the mixture until it's smooth.
Pour the mixture into a pot on the stove and stir it over medium heat until it boils. If your children are helping you, this step should be closely monitored. Continue to stir until the mixture is a thick, cohesive consistency, similar to mashed potatoes.
Place the mixture onto a cutting board to cool. Wait until the mixture is cool to touch.
Place several drops of food coloring over the mixture, then mix it with your hands.
Repeat Step 5 until the play clay is the color you wish it to be.
When you're finished with the play clay, store it in an airtight container to make it last longer.