There are different stories that one can enact at a skit in school, these stories are available in different languages including Malayalam.  These dramas can come with a great moral and message. There are numerous plays both comedy and tragedy plays that can be enacted easily, plays on Vikram and Betal Stories, plays on Tenali Raman, Tales of Mythology can be Indian Mythology or even old  Greek and Indian Mythology, tales on Akbar and Birbal. You can even think of numerous other plays by writers. Plays even are on short stories like on that of different kings and dynasties that have ruled the country and the changes and progress they have got. What do you say?