Looking for a different type of critique?Author
Jill Esbaum critiques picture book manuscripts.
Author and children's literature advocate
Cynthia Leitich Smith has a list of additional editors and authors who provide manuscript critiques
here.
For roll-your-sleeves-up practice on your query letter, visit
The Query Shark (who's a well-respected literary agent in disguise).
See a list of
standard proofreader's marks here.
For additional information on writing and publishing for children:SCBWI (The Society of Children's Book Writers and Illustrators). Its
Resources Library is especially useful for beginning writers.
The Purple Crayon is packed with knowledgeable information on children's book publishing.