What to collect from baseball stadiums?

1. A photo of you near the first row of box seats with the field (and scoreboard) in the background - preferably taken during the game

2. A photo fo you standing in front of the stadium exterior

3. A program and ticket from each game

4. If the gift shop has them - a postcard of the stadium

5. The game story and boxscore from the next day's local paper

6. Some momento unique to each city to give to your girlfriend when you get back home - maybe a flower vase with the city name

Have fun

I personally collect baseballs that have a picture of the stadium on it. :D

You should check to see if the sell any sort of cuddly stuffed animals with the respective home teams' logos on them.

I collect pins with my fav players on them so maybe could also try to find pins with your girlfriend's fav players on them.