Learning how to make clay is so easy! This homemade clay recipe uses simple ingredients you probably have in your kitchen already, and it's so nice to work with! How to Make Clay - Only 3 Ingredients! Air dry clay is so easy and so inexpensive to make! Why spend tons of money on store bought clay, when learning how to make clay at home is so much cheaper and so much fun?! We tested a few different clay recipes and this one was the BEST! And you only need 3 ingredients - water, cornstarch, and baking soda! You don't