Caz is a fearless & high-spirited gal. Her latest mission in life is to bring shy Keith the Koala out of his shell. With Caz's fun-loving, laid-back attitude, she may be the most popular of all the Aussie Animals, not to mention one of the cuddliest. Unlike squeakers, which are short-lived & unintuitive for babies to use without assistance, the sound the rattle makes when babies hold or move it stimulates action-reaction learning, providing babies & toddlers with an instant reward & helping them understand cause & effect.