I love parents.com. They always have some great articles and advice. I found this article which I'm totally going to use on Carson because that kid only talks when he wants to.
Here are some great questions you can try on your kid!
What do you like daydreaming about?
What makes you happy? What have your friends been up to?
If you could do anything right now, what would you do?
What do you look forward to when you wake up?
And check out the entire list of 50 questions here!