Dear Ally
Sounds like a wonderful project! And well done on getting a reply from a publisher, and such a helpful one too. I'm afraid I'm not a children's writer - you might want to join the Children's writers group - I think there is one on site - and ask there.
What I would say though is keep on submitting your poems to as many publishers as you can - go into your nearest bookshop, browse through the children's poetry section and write down all the publishers represented. Then send the work to them. And keep on sending - it can be a long haul.
As for the fiction, it depends whether the book you're writing has a space for the poetry in it - only you can decide. If they don't belong together, then I would be reluctant to send two submissions to the same publisher at the same time - they're easily confused and may think that you don't know where your metier lies? - I could be wrong here though, and those who know the children's market need to set us right.
Hope this goes some way towards helping, but do ask someone who knows your genre also.
Good luck!
LoL
A
xxx
PS Poetry IS writing too!!!
)