Here's some of the things that have helped me and might help you too!
Self Publishing / Print On Demand companies
Deciding between Createspace or Lightning Source...
Createspace a self-publishing/print on demand website with lots of helpful FAQ and forums is the one I chose. I will submit a PDF of my book, after I've got it exactly how I want it. They'll double check it to make sure it will print ok, and I'll order one copy. I'll double check the hard copy to make sure it's how I want it and then Createspace will make it available to the public to purchase at amazon.com. I will get a royalty from each book that is sold (at the price I choose) and won't have to deal with printing, storing, mailing, returns, etc...
The Self-Publishing Manual (How to write, print, and sell your own book) Thanks Dale
Writing Children's Books for Dummies
The Everything Guide to writing children's books (If I just picked one.. this would be it)
2013 Children's Writer's & Illustrator's Market
Elizabeth O Dulemba (Author, Illustrator, Speaker ...with awesome advice)
Dianne Ochiltree (Children's /Author)
New Self-publisher FAQ
Children's book stuff
SCBWI (Society of Children's Book Writers and Illustrators)
ISBN Numbers websites
Free barcode for your ISBN
Best of luck!