Hi there. It sounds like a great project. In terms of why I'm the strongest candidate for this, I have a degree in Creative Writing, worked for a video games company which makes educational games for kids for over six years and I have also recently been hired to write dialogue for an educational game for kids. I have also already received a glowing recommendation/review for doing so, which you can verify on my Linkedin profile (see [login to view URL] - the recommendation is from Andy Cargile of SMART Technologies).
Whilst employed by Herotainment, I came up with the concept for many of the Smighties. You can download some Smighty games free of charge on your mobile device (Mighty Smighties, Smighty Stack, and Smighty Sweeper).
I was also previously employed to write the script for a children's cartoon series (Dream Team) and you can find a sample of that script in the Portfolio section of my Profile on this site. If you require any further samples or if you have any questions, just ask.
Did you have a budget in mind for this project? I hope to hear from you soon. All the best.