Mom . . . there's an elephant in the living room. It's moving day-and look who slipped in the door: an elephant! But when a little girl tries to tell her family about their unusual guest, the distracted grown-ups just say, ""Ella Who?"" Even as children giggle at the girl's adventures with the smallish pachyderm, and at the fun, recurring refrain, they'll relate to the poignant theme about making-and sometimes letting go of-new friends.