Simplify the following text for a Grade 6 native English-speaking person.
Original: Chiara started her career at the age of eight , when she was cast as the `` Pokey Little Puppy '' in a cartoon called Little Golden Bookland and has n't stopped working since .
Simplified: She was cast as the `` Pokey Little Puppy '' in a cartoon called Little Golden Book Land and has not stopped working since .