Length of books, words, pictures...
Hey Sherrie,
As a librarian, my observation is most children's books are about 32 pages long.
As for # of words, that varies and as one said some books have no words. However, I prefer the ones with words personally.
My suggestion would be to go to the library and begin reading books by successful authors like Rosemary Wells and others. Ask the library staff what children are reading and read some of those books.
The writer's market books are great for getting publisher info so you can send your work off. The library might even have copy so you don't have to buy one. I saw a copy at Hasting the other day.
Don't worry about pictures. Most the time the publishers don't want them to accompany the book. If they are going to publish your book they will select an illustrator for your book. Most the time the author and the illustrator don't even know each other...many times they may never even meet.
Luck!
Sandra