You can subscribe (free) to the
www.homeschoolfreebie.wholesomechildhood.com, besides having very interesting posts for homeschoolers every day, quite often they post links to audio downloads, although it´s usually for a bit older children.
If you are interested in some spiritual input, look through
www.mywonderstudio.com, besides a lot of very nice devotional material for the younger lot, they have a few audio Bible stories posted, e.g.
http://www.mywonderstudio.com/level-2/2012/10/19/an-audio-bible-adventure-winning-a-battle-with-lifted-hands.htmlHope this helps a bit.