Answer:
The diagram is attached below
Explanation:
A sentence diagram is made using lines in the form of a cross, where the subject of the sentence is placed on one side, while the predicate of the sentence is placed on the other side.
To find the subject of the sentence it is necessary to know who is performing the action indicated by the view contained in the sentence. In the sentence shown above, we can see the verb "played", who are performing this action are "The small children", therefore, "The small children" is the subject of the sentence.
The predicate, in turn, refers to everything that is being said about the subject. In the case of the above sentence, the subject is "played quietly," which means that "played quietly" is the predicate.
