I wonder if I can get somewhere at internet pdf or e-books sor downloading that are about children magic

I purchased one from tim shoesmith called Fountains and Acorns for Little People. It contains some good routines and games and advice. he also has a DVd out called magic Without Mayhem which details a gentle appraoch as opposed to a boisterous approach to children's shows. I think he's British and does have an amicable manner that holds the kids attention well. he also has a great show setup! Try this link:
http://www.timsmagic.net/shop/index.php

Wayne Rogers has a kid's magic lecture available in pdf, I haven't bought it so I can't recommend it either way:

http://www.nzmagic.com/productpg.html#lecture

The Cool Magician http://www.lybrary.com/cool-magician-p-365.html has some interesting stuff for a bit older kids. It has also non-kids stuff in it, but worth checking out.