where can I read books online for free for children?

Answer 1

Try here:

http://www.free-books.org/

or here:

http://www.magickeys.com/books/index.html

Answer 2

There's also:

http://www.icdlbooks.org/

http://www.sundhagen.com/babbooks/

http://www.weread.org/kids/download.asp

http://www.mindlikewater.com/Directory/Free/childrens_free_ebooks.html

http://etext.virginia.edu/ebooks/subjects/subjects-young.html

Hopefully, you'll find something that you want to read on one of these sites!