I'm no expert, but I did attend a conference for writers of children's books and learned a few things. Since you asked for advice about publishers that would work alongside you, I suggest you look into small publishing houses, rather than the big ones. But before you start contacting publishers, you might want to work with an editor to prepare the book for publishing. You'll get a better response from any publisher if the book is already polished. There are lots of reading levels and you didn't say what age your book is for. You should know who your readers are so you can submit the book to the right publisher. And finally, if it's a picture book, the small publishers may ask you to provide illustrations, but the large ones will probably have their own illustrator. I hope this helps.
To find publishers I would look for books like yours, see who published them and then look for their writer's guidelines (either on-line or in Writer's Market to see if they are accepting submissions.
A friend of the Bridegroomhttp://www.delightedmeditations.blogspot.com
"And now, dear brothers and sisters, one final thing. Fix your thoughts on what is true, and honorable, and right, and pure, and lovely, and admirable. Think about things that are excellent and worthy of praise." Philippians 4:8 NLT