Combine the dry ingredients and then add the wet. Stir with a spoon until it cools enough for you to knead. Knead the dough until it is smooth. If the dough is too wet, sprinkle in more flour a tablespoon at a time. I've listed above the exact measurements that I use most of the time. However, I've found that if it is a humid day it might require extra flour. I've added as much as an additional 1/3 cup of flour on occasion. Store the playdough in an airtight container in the refrigerator.