Simplify the following text for a Grade 7 native English-speaking person.
Original: Hobbits first appeared in the novel , The Hobbit , in which the main protagonist , Bilbo Baggins , is the titular hobbit .
Simplified: They appeared in the books The Hobbit and The Lord of the Rings . Several important main characters in those books are hobbits , such as Bilbo Baggins and Frodo Baggins .