I work as an ESL teacher to kids in China 5 days a week (online, I live in the US). I also lead worship for the kids at my church, and I've got years of experience working with kids otherwise in varying capacities. So, narrating a children's book would be no problem. Among my many Audible credits, one of them is a children's book.
My demos are on my profile. For this project, I would listen to my Character demo, Audiobook demo, and Children's Song.
Your contract and technical requirements will be no problem.
I've been a VO professional for over 10 years, doing everything from commercials to audiobooks to video games to cartoons to everything in between, and will deliver quickly in the desired file format with fast communication.
Equipment and software include:
Shure KSM44 microphone
Focusrite Scarlet Solo preamp
Cakewalk SONAR X2
Adobe Audition CC
NOTE: I will not be available for the next two weekends as I'll be out of town. Monday-Thursday are just fine, though.