I am always looking for fun things to make with my kids. I have a cook book that was made by the town I live in, I found a recipe in it for play dough. It is very easy.
2 1/2 C flour 3 T. oil
1/2 C. salt 2 C. boiling water
1 T. alum
Begin boiling water
Stir flour, salt and alum together in a large bowl. Add oil and cut oil into flour. Add water. Mix with a large spoon until cool enough to knead with hands.
***If you want to make the play dough colored add coloring to water BEFORE you add water to flour mixture. I have split the flour mixture into two bowls and added 1 C. of different colored water to each bowl.
I store the play dough in a ziploc bag. It will stay good for months, if you keep the bag closed. The older it gets, it will start to get hard salty spots in it. I just pull those out and trash them.
I love this play dough because I KNOW what is in it, and it is super cheap to make.