This may be a little off-topic, but I have been asked to give English lessons to kindergarten (ie. pre-literate) children aged from 4 to 6. I have plenty of experience teaching TEFL to adults, but planning lessons for such young children is proving quite a headache.
Then I was reading a thread recently and HE came up and someone mentioned a book called, I think, Free Range Kids? It started me thinking that maybe there would be some ideas in it to help me with my kindergarten lessons. (From speaking to the parents it is clear that they are concerned that the lessons not be too formal, rather than being concerned that the children will learn a lot.)
Has anyone read that book or any others that they think could be of some use? I'm looking for information about the way children learn, especially in the early years, rather than polemics about the dangers of institutionalising children, as HE is illegal in Germany and I don't want to get ideas... 
Website recommendations would also be very welcome.