In the original novel created by Michael Crichton and the subsequent film adaptation of Jurassic Park, Tim Murphy is depicted as being around 11 years old, while his sister, Lex Murphy, is approximately 7 years old.
These ages are important as they highlight the characters’ youth and vulnerability in the highly dangerous environment of Jurassic Park. Their ages not only affect their interactions with the adult characters, such as Dr. Alan Grant and Dr. Ian Malcolm, but also allow the audience to relate to them on a more personal level as they navigate the terrifying challenges presented by the park’s dinosaurs.