Then write with them short dialogues like :

 

�Hello, my name �s John. I �m a lawyer. What �s your name and what �s your job ? �

�Nice to meet you John. My name is Laetitia and I �m a nurse. I work in the public hospital and I have to wear a white coat. Where do you work and what do you usually wear when you work ? �...

 

Make them play this in front of other classes.

 

You could make them write a text about their parents � job describing their clothes (a protective helmet for example), the necessary �tools � (hammer, screwdriver... comb, brush, hair dryer...), the place where they work (the public hospital, the library...). Short descriptive text with the advantages and disadvantages of the job they would read in front of their friends who finally ask questions at the end.

 

Hope this will help you for getting more ideas.