Does anyone know of any audio messages about teaching children how to pray?

I'm not looking for books, since I work on the computer all day, I would like something to listen to.

We model prayer for our children, and they pray. We want to teach them more about prayer, the truths about prayer, how to pray more effectively, and how to pray for the nations.

Sorry for all the conditions. I posted a similar question on another forum, and got all kinds of answers except any that attempted to answer the question in any kind of way.

Thanks for any help,
oboy