Until I heard of this book, I only knew E.B. White as the author of Charlotte's Web and Stuart Little. (one of my favourite kids movies too - with Geena Davis and Hugh Laurie).
The Trumpet of the Swan first came to my attention on this Dinner A Love Story post about the best collection of books to give a new baby. I have most of them now but I think this one is my favourite.
If your kids are of the age when they can still for a half an hour each evening, and you need some kind of stress relief, just order this book. Get the hardcover (I wish I had) because its one that will be around for a long time. I read it on a camping holiday, so I did have a captive audience (no wifi, Nintendo DS out of battery, laptop out of charge, everyone in withdrawl) but my three elder boys, then eleven, nine and seven sat rapt while I read. We usually did it when our youngest was having a nap and my husband was deciding which incredibly cheap but delicious wine he was going to get in the nearby French supermarket. Happy Days.
For ages seven and up.