Bijou's Big Adventure by Frances Ann Ladd
Bijou is one of the loveliest Ham-Hams and her friends love spending time with her. Unfortunately Bijou is also a very timid Ham-Ham and she dares not leave her cage for fear of the outside world. So the Ham-Hams set off to persuade Bijou that visiting the outside world is fun. Will she finally be tempted to make her first great escape?