Messieurs les enfants

Messieurs les enfants is a 1997 French comedy film, directed by Pierre Boutron.
Plot.
Caught out by their French teacher, Joseph, Igor and Nourdine end up with punishment for the following topic : "You wake up one morning and you see that in the night, you were transformed into adults. Completely distraught, you rush into your parent's room. They were transformed in children. Tell result." Unfortunately for them, the subject will become reality.