[header] How to make play dough [title] Mix the dry ingredients. [step] In a mixing bowl, combine the flour and salt until the mixture is evenly blended. [substeps] 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.