It is an enjoyable activity for students to familiarize the subject and have a good laugh at the same time
Ask your students form a circle.
Start the chain with a sentence in the target structure.
The first student remembers and repeats what you said using the correct pronouns, and then adds his own sentence.
The next student repeats what you and his friend said, and then adds his own sentence.
The chain goes on like this till the last student.