A.N.
Hi D....looks like you've received a lot of good responses!
I have been running a mural business (whirleygirl designs) specializing in childrens spaces for 8 years. You can see a bit of my work at my website http://www.whirleygirl.com or feel free to call me at ###-###-#### to discuss and set up a free consulatation (it's a chance to look at the spaces, talk about ideas, and for you to see my full portfolio).
I am listed here on Mamasource as well(with a few client reviews :) )
No matter what artist you go with, your children will love having such fun and imaginative rooms!