There is a neat book called Guide to the Magic for Kids which has places to collect the passport stamps plus a bunch of other fun stuff to do while on a WDW vacation. Here is a link to the book on
Amazon:
http://www.amazon.com/gp/product/09...=1789&creative=390957&creativeASIN=0979275849
One of the preview images in the Amazon listing shows the page for the Mexico pavilion. You can see where it has spaces for the passport stamp, for the CM to write sometime and where the youngster can draw a picture of the country's flag.
There are also journal pages where kids can write about their trip, pages for each attraction where kids can indicate whether they liked it or not and write a few thoughts, stickers, etc.
Our son completed one of these books a couple years ago and DD wanted her own a year later. They are kinda bulky to carry around but lots of fun for the kids.
Just thought I'd share that option for anyone interested in the Passports.