Sorry took me so long to get to this. Congrats Ice!. I'm assuming this may lead to a sale (not for someother reason) and that's a double congrats!
Don't sweat the meeting. It will probably be short and will never meet your expectations or fears.
My friend, Chandus, just won the Disney Fellowship (not announced yet so keep it under your hats)and when he became one of the 20 finaists, they flew him out to the Disney Studios to meet with the top executives.
It was a 15 minute interview and he was so scared, he he just took a deep breath, walked in, sat down and kept remembering why he was there.
That's my advice to you. Keep remembering that you are there because you a good storyteller and have a marketable product. You are good at what you do!
I have had a few meetings in my day and they all pretty much went the same.
They may ask you why you are a writer, background, education. They will probably ask you questions about the story and characters and where you came up with them. Why does a charcater do this or that? They may say they like things but the budget won't allow it and ask you to come up with something else. They don't expect you to come up with great ideas during a phone meeting, but they do what to get a feel for you and see if your are one of those "my scripts are perfect and need no change" kinda people. They mainly want to talk to you on the phone to see if they can work with you for the next six months or maybe longer.
Be yourself, be calm, have fun, but most important, show them you are willing to make changes, but will explain why they are important to the story, so they can decide for themselves.
As for the kids... Defiantly keep them far, far away.
Again. congrats and knock them dead.