Do you have a nonfiction story you're developing, or one that is complete and looking for a home? Just sharing this amazing list of nonfiction children's book publishers with you so you'll have a starting place. The article is called OPEN FOR SUBMISSIONS, and it is written by an author called Stephanie Bearce.
Here is a brief sample of the wonderful collection of publishing houses:
Children’s Book Publishers Open for Submissions
Albert Whitman: https://www.albertwhitman.com/submission-guidelines-for-unrepresented-authors/
Allen and Unwin: https://www.allenandunwin.com/about-allen-and-unwin/submission-guidelines
Andrews McMeel: https://publishing.andrewsmcmeel.com/submissions/
Annick Press: https://www.annickpress.com/Submission-Guidelines
There is much more where that comes from, so be sure and click the link above to read the entire article. Remember to do your homework. Study submission criteria and respect the submission window. Self-edit, and if at all possible, get as many eyes on your manuscript before you submit it as possible. And after you've done your best... submit! We're cheering for you.