How? Come, we leran how to go natural :
I copied this recipe from this website :
Now, we can start make our very own play-doh!!
Cooked playdough recipes
Everyone seems to have a favorite playdough recipe, and many old favorites have been included here. Some require cooking and some don't; some are meant to be eaten and some are not. Choose the recipe that best suits your needs and the ingredients you have on hand. Store playdough in a covered container or Ziploc bag. If it sweats a little, just add more flour. For sensory variety, use playdough warm or cool as well as at room temperature.
1 cup water
1 tablespoon vegetable oil
1/2 cup salt
1 tablespoon cream of tartar
1 cup flour
Combine water, oil, salt, cream of tartar, and food coloring in a saucepan and heat until warm.Remove from heat and add flour.Stir, then knead until smooth. The cream of tartar makes this dough last 6 months or longer, so resist the temptation to omit this ingredient if you don't have it on hand.Store this dough in an airtight container or a Ziploc freezer bag.