Ingredients:
2 unit of cornstarch
4 units of baking soda
4 units of water
put in (lets say teaspoon) 2 tsp of cornstarch and 4 tsp of baking soda and 4 tsp of water in a bowl
and stir.
put the mixture in a microwave and microwave for 10 secounds(only if your using teaspoon which i prefer)When you have microwaved it for 10 secounds take it out and mix it should only puff up and leave a little liquid.Take it out a knead it if it is still sticky add some cornstarch.
And TADA theres your baking soda clay put them in air tight containers to prevent them from drying out!