Need help making a book, designing a poster. For a kid!

Shadowfire

My daughter retold a story in pre-k and made her own drawings to go with it. The story is goofy and the drawings are pretty ridiculous 5 year old doodles, but I love the whole thing. I could laminate the pages and do something cheap, but I really want to make a short board book out of it for her for Christmas. Something she can flip through anytime and maybe hang on to. I have no idea how to start on something like that, though. Is there a site I can go to for that?

I'm also looking to get a piece of art made for her. She's big into unicorns and dragons (good girl), and I'd love to get a custom poster made. Bonus points if I can get her riding one or the other.

Icemopper

For your first question, I've used snapfish.com quite successfully for a couple family cookbooks and a children's book in a similar way to your description. The quality is good enough and the prices are reasonable.

Radiation

Artists corner has a few people who do commission work.
https://forums.penny-arcade.com/discussion/194219/looking-to-hire-an-artist-start-here#latest