You could last year when we used it but I know the plan has changed over time so I am not quite sure. Heck, we had 10 snacks left (for the 3 of us) on our last day and we were at a cookie / candy store at DD - West Side. We were even able to get candy and some big cookies for the trip home....that was really cool. Not sure if you can do that anymore either.
I did hear for 2008 the snacks were going to be more specific but not sure for 2007. I'm sure someone knows for certain.