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How to make play dough
Mix the dry ingredients.
In a mixing bowl, combine the flour and salt until the mixture is evenly blended.
Adding a tablespoon of alum to the mixture will make the dough less palatable to a child, reducing the likelihood that the child will eat it.
The alum also works as a preservative to help slow down the growth of bacteria. It's non-toxic, but large amounts can cause stomach aches.