If you are writing a children's book and want professional advice, to find a crit group and hear what's happening in publishing, join the Society of Children's Book Writers and Illustrators at http://www.scbwi.org/ It's inexpensive. They have chapters all over the country. Once a year each chapter brings in authors, editors and agents. You can submit your first 30 pages and get feedback from a pro. The speakers are helpful and motivational. The audience ranges from aspiring to veterans.
Verla Kay's Website - A place for children's writers and illustrators to gather and share information, help each other and have fun while learning the business of writing and illustrating for children.
This article may be a throwback, but John Grisham's key to success, acclaimed writer Brian Garfield, lays out the 10 rules for suspense fiction here. If there's anyone to listen to to tweak your story, it's this guy.