And until such time, airport security does NOT want to see kids passports ... I was a little peeved when I handed all 4 passports and boarding passes, and was handed back all passports with a "just the adults ma'am" ... so instead of him looking at all 4 and been done with it, I had to look at them and only hand back 2 of them. Waste of time, IMHO.
You won't need it until end of 2007 if you're not flying from Canada.
MaryLiz