While I'm an...avid....not-lover of Hilary Duff...*shudder-shudder* I think this would be an awesome idea! Just about anyone from the Disney channel kids would pull this off well, and anything to get the kids interested.
The chick that plays Chelsea on "Raven" might be a good candidate too. She seems more real to me, and still has a great personality.
And that...simply adorable guy on "Phil of the Future"! Ricky Ullman! Oh snap, the visions of hot minors is dancing in my head.
...or is he not a minor?
