This is a great way to review how important vowels are! We listened to it on Tumblebooks and I think that is probably the best way since reading it out loud would actually be quite hard. It would take some practice.
Come meet a very unusual family. Each of the 5 vowel children--Alan, E [etc]--represents one vowel. Until that child is born, his or her vowel is missing from the text of this silly story. As the Vowel family grows, pets from an [a] to a unicorn join their happy home. But then Otto goes missing. Thank goodness clever Aunt Cyndy comes to the rescue and makes the Vowels truly complete!