The term 'play thing' can be broken down into four crossword solutions: SET (3 letters), ROLE (4 letters), ACT (3 letters), and PROP (4 letters). SET refers to the physical environment in which a play or performance takes place, such as a stage or theater. ROLE is the part that an actor or actress plays in a play or performance. ACT is a division of a play or performance, usually consisting of several scenes. Lastly, PROP is an object used on stage or in a performance to help the actors portray their roles.