If you are wondering Is Playdoh allowed on a plane? Yes, Play-Doh is generally allowed on planes. It is considered a non-toxic, non-flammable item and can be brought in both carry-on luggage and checked baggage. If carried in your carry-on, Play-Doh containers must adhere to the TSA's liquid and gel restrictions, with each container not exceeding 3.4 ounces (100 milliliters) and fitting within a quart-sized, clear, resealable plastic bag. However, rules and regulations may vary among airlines, so it's essential to check the specific guidelines of the airline you are flying with before your travel date.