Add all the ingredients except the essential oils to a pot and stir well. Turn the pot on to medium heat. Stir constantly, after about 5 minutes the mixture will start coming together. Continue stirring until most of the water has cooked out and the mixture starts forming a ball around the spoon as you stir. Turn the mixture out onto the counter and let it sit for a few minutes to cool off. Knead the dough a few times to mix it and get rid of any clumps. If you want to add a couple drops of essential oils this is the time to do it. Then, pass the Playdough to the kids and let them start playing without worrying about a gluten contamination!