For my first trip over, I bought one of the American Tourister ones that holds your passport and tickets, with the cord to go around your neck. I was finished wearing it before I left the Indianapolis airport, and threw it in my bag. While it made everything easy to find I ended up with the hassle of taking it out and putting it back. Now I just use a Vera Bradley handbag when I travel, and designate one pocket for passport and boarding passes, one for lots of chewing gum, one for extra pens for crosswords, etc.
Still, being the friend of a die hard (at 40) Hello Kitty fan, and loving all things Smurfs myself, I'd say go for it.