Answer: Homogeneous mixture.
Step-by-step explanation:
Play dough is a homogeneous mixture. A homogeneous mixture is where the components cannot be distinguished from each other and whose components are evenly distributed. Some examples of this you might find in your life, besides play dough, include mixed coffee, a fully blended smoothie, mouthwash, etc.
A heterogeneous mixture is a mixture where the solution is not evenly distributed and the components cannot be distinguished. Some examples include salads, stew, cookies, and more. This does not match play dough.