Small ingestions of playdough are generally considered nontoxic. It does have a high percentage of salt, so large ingestions can be problematic. Call the poison center to assess.
Patient can have upset stomach dependent on formulation and amount.
What to do
Give the patient a small snack and fluids to help settle their stomach. Monitor for 1 hour in case of any vomiting. Call Washington Poison Center for ingestions larger than a taste.