If you don't love play dough you don't know how to love!
Here is my recipe for gluten free play dough. While play dough is not something that should be eaten it can still be be a concern for kids with celiacs as a single "crumb" of gluten can be a concern.
3 cups flour (see for the flour blend I use)
1/3 cup salt
1/4 cup oil
1 1/4 cups hot water
If your blend does not already have xanthan gum then add 1.5 teaspoons