Juvenilia is an artistic, musical or literary work that authors produce during their youth. For instance, when Jane Austen was twelve, she started her writing career. Austen wrote poems, short stories, plays and satires in her tender age that collectively known as Juvenilia. You would notice humor in her earliest works too. At the age of eighteen, she wrote her first lengthy work a novella, “Lady Susan” in form of letters in 1793.