I trawled several pages of the web and came up with this list of audio books, free and not-free:

Free audio books
www.storynory.com ( for kids, excellent, good English used)
www.librivox ( for everyone, but goodness, you really have to ferret out the good ones. Some of the readings put me to sleep. While others, like one of Beatrix Potter’s “The tailor of Gloucester” , are good.)
www.freeclassicaudiobooks.com ( monotonous, the scene here seems to be dominated by one reader.)
www. booksshouldbefree.com ( the ones here are actually librivox recordings.)

Not-free audio books
www.blackstone.com ( expensive, looks interesting)
www.talking-book-store-com (excellent recordings, excellent readings, moderately priced)
www.audible.com ( excellent recordings, a range of prices )
www.audiobookscorner.com (good , a range of prices )

Now, to sit back , relax and let the words flow over me…hah, easier said than done with two lively kids!