You can also make them Journals to fill out for everyday of your trip.
Get two clear plastic covers and two different colored sheets (one for front & one for back)
Then go to This address where they have pages already made up for you to print out in color.
http://www.themouseforless.com/down...s/journal.shtml
get yourself some of the 3D stickers, make the cover, bind it (you can have it bound at staples for a fee) and Bingo, a personalized journal that your children will have for many years to come.
here's a picture of one of my Journals before I bound it.